{"id":2473,"date":"2026-10-06T04:43:23","date_gmt":"2026-10-06T12:43:23","guid":{"rendered":"https:\/\/www.vintelecom.net\/?p=2473"},"modified":"2026-10-06T04:43:23","modified_gmt":"2026-10-06T12:43:23","slug":"fxo-vs-fxs-which-voip-gateway-does-your-business-need","status":"publish","type":"post","link":"https:\/\/www.vintelecom.net\/nl\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/","title":{"rendered":"FXO vs FXS: Which VoIP Gateway Does Your Business Need?"},"content":{"rendered":"<p class=\"my-3 first:mt-0 last:mb-0\">Two letters decide how your business connects to the phone network, and most buyers get them backwards.\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXO connects to the line coming from your telephone company. FXS connects to the telephone itself.<\/strong>\u00a0Once you know which side of the cable you are on, choosing a VoIP gateway is straightforward \u2014 and picking the wrong one is the most common mistake in VoIP projects.<\/p>\n<h2 class=\"mt-8 mb-3 text-[1.25em] font-semibold tracking-tight text-foreground first:mt-0 dark:text-zinc-100\">What FXO and FXS actually mean<\/h2>\n<ul class=\"my-2 space-y-1.5 marker:text-muted-foreground\/60 dark:marker:text-zinc-500 pl-6\">\n<li class=\"leading-7 \"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXO (Foreign Exchange Office)<\/strong>\u00a0behaves like an\u00a0<em class=\"italic\">office<\/em>\u00a0\u2014 a fax machine or a phone plugged into a wall jack. It expects to receive dial tone from the carrier. An\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXO gateway<\/strong>\u00a0accepts analog PSTN lines and converts them into SIP trunks for your IP-PBX.<\/li>\n<li class=\"leading-7 \"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXS (Foreign Exchange Station)<\/strong>\u00a0behaves like a\u00a0<em class=\"italic\">station<\/em>\u00a0\u2014 the wall jack itself. It supplies dial tone, ringing voltage and battery. An\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXS gateway<\/strong>\u00a0provides analog ports for your existing telephones and turns them into SIP extensions.<\/li>\n<\/ul>\n<p class=\"my-3 first:mt-0 last:mb-0\">A useful mnemonic:\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXS serves the phone (Station = the set), FXO talks to the office (the carrier).<\/strong><\/p>\n<h2 class=\"mt-8 mb-3 text-[1.25em] font-semibold tracking-tight text-foreground first:mt-0 dark:text-zinc-100\">How to tell which one you need<\/h2>\n<p class=\"my-3 first:mt-0 last:mb-0\">Ask one question:\u00a0<em class=\"italic\">what is on the far end of the cable?<\/em><\/p>\n<div class=\"my-5 relative flex-1 min-h-0 min-w-0 hover:cursor-default overflow-x-auto overflow-y-hidden phoenix-scrollbar\">\n<div>\n<table class=\"w-full border-collapse overflow-hidden rounded-md border border-border text-[0.95em] dark:border-zinc-700\">\n<thead class=\"bg-muted\/60 dark:bg-zinc-800\/60\">\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<th class=\"px-3 py-2 text-left font-semibold text-foreground dark:text-zinc-100 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">What you have today<\/th>\n<th class=\"px-3 py-2 text-left font-semibold text-foreground dark:text-zinc-100 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">What you keep<\/th>\n<th class=\"px-3 py-2 text-left font-semibold text-foreground dark:text-zinc-100 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Gateway you need<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"divide-y divide-border-divider dark:divide-zinc-800\">\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Analog lines from the carrier<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">The lines and their phone numbers<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXO<\/strong><\/td>\n<\/tr>\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Analog telephones, cordless bases, fax machines<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">The handsets you already own<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXS<\/strong><\/td>\n<\/tr>\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Both<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Numbers and handsets<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXO + FXS<\/strong>, or a hybrid IP-PBX with built-in ports<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p class=\"my-3 first:mt-0 last:mb-0\">Quick test: if lifting a handset gives you\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">dial tone<\/strong>, that cable is an analog line \u2014 it belongs on an FXO port. If the cable stays silent until a phone is plugged in and rung, it is an extension \u2014 it belongs on an FXS port.<\/p>\n<h2 class=\"mt-8 mb-3 text-[1.25em] font-semibold tracking-tight text-foreground first:mt-0 dark:text-zinc-100\">Side-by-side comparison<\/h2>\n<div class=\"my-5 relative flex-1 min-h-0 min-w-0 hover:cursor-default overflow-x-auto overflow-y-hidden phoenix-scrollbar\">\n<div>\n<table class=\"w-full border-collapse overflow-hidden rounded-md border border-border text-[0.95em] dark:border-zinc-700\">\n<thead class=\"bg-muted\/60 dark:bg-zinc-800\/60\">\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<th class=\"px-3 py-2 text-left font-semibold text-foreground dark:text-zinc-100 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\"><\/th>\n<th class=\"px-3 py-2 text-left font-semibold text-foreground dark:text-zinc-100 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">FXO gateway<\/th>\n<th class=\"px-3 py-2 text-left font-semibold text-foreground dark:text-zinc-100 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">FXS gateway<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"divide-y divide-border-divider dark:divide-zinc-800\">\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Connects to<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Analog carrier lines<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Analog phones, fax machines, cordless bases<\/td>\n<\/tr>\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Behaves like<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">A telephone set (office)<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">A wall jack (station)<\/td>\n<\/tr>\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Dial tone<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Receives it<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Generates it<\/td>\n<\/tr>\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Typical use<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Keep existing PSTN numbers; add failover trunks<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Keep existing analog handsets<\/td>\n<\/tr>\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Port counts<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">4 \/ 8 \/ 16 \/ 32<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">4 \/ 8 \/ 16 \/ 32<\/td>\n<\/tr>\n<tr class=\"[&amp;&gt;*+*]:border-l [&amp;&gt;*+*]:border-border-divider dark:[&amp;&gt;*+*]:border-zinc-800\">\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">Example model<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">FXO-16O (16 FXO ports, 16 SIP channels)<\/td>\n<td class=\"px-3 py-2 align-top text-foreground dark:text-zinc-200 [&amp;_img]:h-auto [&amp;_img]:w-auto [&amp;_img]:min-w-[60px]! [&amp;_img]:max-w-[160px]!\">FXS-32S (32 FXS ports, 32 SIP channels)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p class=\"my-3 first:mt-0 last:mb-0\">Both families share the same core VoIP feature set: SIP V2.0 (RFC 3261), open-standard registration to IP-PBX and hosted platforms, primary and backup SIP accounts, G.711\/G.723.1\/G.729A\/B\/G.726\/iLBC\/AMR codecs, G.168 echo cancellation, T.38 fax support, call routing and number manipulation, call budgeting with CDR records, and web\/SNMP\/TR-069 management.<\/p>\n<h2 class=\"mt-8 mb-3 text-[1.25em] font-semibold tracking-tight text-foreground first:mt-0 dark:text-zinc-100\">Scenario 1 \u2014 Keep the carrier lines, move to an IP-PBX (FXO)<\/h2>\n<p class=\"my-3 first:mt-0 last:mb-0\">You have four analog lines and a failing legacy key system, and you cannot abandon the numbers. An\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXO gateway<\/strong>\u00a0takes those lines, registers them as SIP trunks, and your IP-PBX owns the calls. Sites normally size to the number of lines they keep, and often reserve one or two FXO ports purely as\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">failover<\/strong>: if the SIP trunk or the internet link fails, outbound calls route out over the analog lines.<\/p>\n<h2 class=\"mt-8 mb-3 text-[1.25em] font-semibold tracking-tight text-foreground first:mt-0 dark:text-zinc-100\">Scenario 2 \u2014 Keep the analog phones, move to an IP-PBX (FXS)<\/h2>\n<p class=\"my-3 first:mt-0 last:mb-0\">Your desk phones are reliable and already paid for, but you want voicemail, recording, call accounting and centralised management. An\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXS gateway<\/strong>\u00a0supplies the analog ports those phones need, and each phone becomes a SIP extension. This is usually the cheapest route to VoIP for an existing site:\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">no new handsets, no rewiring<\/strong>\u00a0\u2014 one 1U gateway in the comms room. A 16- or 32-port model covers a floor or a small office; 4- and 8-port models suit branches and workshops.<\/p>\n<h2 class=\"mt-8 mb-3 text-[1.25em] font-semibold tracking-tight text-foreground first:mt-0 dark:text-zinc-100\">Scenario 3 \u2014 You need both<\/h2>\n<p class=\"my-3 first:mt-0 last:mb-0\">Running both interfaces at once is a legitimate architecture, not a workaround:<\/p>\n<ul class=\"my-2 space-y-1.5 marker:text-muted-foreground\/60 dark:marker:text-zinc-500 pl-6\">\n<li class=\"leading-7 \"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXO ports<\/strong>\u00a0terminate the carrier lines, including failover lines.<\/li>\n<li class=\"leading-7 \"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">FXS ports<\/strong>\u00a0keep the existing analog handsets working.<\/li>\n<li class=\"leading-7 \">The\u00a0<strong class=\"font-semibold text-foreground dark:text-zinc-100\">IP-PBX<\/strong>\u00a0in the middle handles routing, voicemail, conference and call accounting alongside IP phones.<\/li>\n<\/ul>\n<p class=\"my-3 first:mt-0 last:mb-0\">Build it with two gateways (one FXO, one FXS), or with a hybrid IP-PBX that already has FXS and FXO ports built in \u2014 the UC200-15 and UC200-30, for example \u2014 and add gateways as the site grows. For a single line plus one phone, a combined adapter such as the SPA232D (1 FXS + 1 FXO) covers both ends in one box.<\/p>\n<h2 class=\"mt-8 mb-3 text-[1.25em] font-semibold tracking-tight text-foreground first:mt-0 dark:text-zinc-100\">Sizing the gateway: devices, not people<\/h2>\n<ol class=\"my-2 space-y-1.5 marker:text-muted-foreground\/60 dark:marker:text-zinc-500 pl-6\">\n<li class=\"leading-7 \"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">Count physical endpoints.<\/strong>\u00a0An FXO port is one carrier line; an FXS port is one analog device (phone, fax, cordless base). IP extensions can far outnumber gateway ports, because IP phones share the network rather than the ports.<\/li>\n<li class=\"leading-7 \"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">Size for peak use, then add two spare ports.<\/strong>\u00a0Analog lines and handsets are physical: if a fax machine loses its port, the site loses its fax line.<\/li>\n<\/ol>\n<p class=\"my-3 first:mt-0 last:mb-0\">If you are unsure how many lines the business needs, work that out before buying hardware.<\/p>\n<h2 class=\"mt-8 mb-3 text-[1.25em] font-semibold tracking-tight text-foreground first:mt-0 dark:text-zinc-100\">FAQ<\/h2>\n<p class=\"my-3 first:mt-0 last:mb-0\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">Q1. In one sentence, what is the difference between FXO and FXS?<\/strong>\u00a0FXO connects your system to the carrier&#8217;s lines; FXS connects it to analog telephones.<\/p>\n<p class=\"my-3 first:mt-0 last:mb-0\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">Q2. Can an FXO port power an analog phone?<\/strong>\u00a0No. FXO expects to receive dial tone; dial tone, ringing voltage and battery come from FXS ports.<\/p>\n<p class=\"my-3 first:mt-0 last:mb-0\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">Q3. Can I use an FXO gateway without an IP-PBX?<\/strong>\u00a0It needs a SIP platform to register with \u2014 IP-PBX, softswitch or hosted VoIP. It converts lines into SIP trunks; it is not an internal call system by itself.<\/p>\n<p class=\"my-3 first:mt-0 last:mb-0\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">Q4. One large gateway or several small ones?<\/strong>\u00a0A single 32-port unit costs less per port and is easier to manage; two 16-port units in different racks add resilience and shorten analog cable runs, which are distance-limited.<\/p>\n<p class=\"my-3 first:mt-0 last:mb-0\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">Q5. Do these gateways support fax?<\/strong>\u00a0Yes \u2014 T.38 FoIP with T.30 (V.17) up to 14.4 kbps, plus DTMF in-band, RFC 2833 and SIP INFO signalling.<\/p>\n<p class=\"my-3 first:mt-0 last:mb-0\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">Q6. Will they work with my IP-PBX or hosted VoIP provider?<\/strong>\u00a0Yes, provided the platform speaks standard SIP: they register as SIP endpoints with primary and backup accounts, number manipulation and digit maps.<\/p>\n<h2 class=\"mt-8 mb-3 text-[1.25em] font-semibold tracking-tight text-foreground first:mt-0 dark:text-zinc-100\">Choosing in one line<\/h2>\n<p class=\"my-3 first:mt-0 last:mb-0\"><strong class=\"font-semibold text-foreground dark:text-zinc-100\">If the cable carries a phone line, you need FXO. If it ends at a telephone, you need FXS.<\/strong>\u00a0Most growing businesses end up needing both \u2014 and a hybrid IP-PBX with gateways at the edge scales without locking you into either technology.<\/p>\n<p class=\"my-3 first:mt-0 last:mb-0\">VIN Telecom manufactures both families in 4, 8, 16 and 32-port versions, so one platform, one management tool and one firmware logic cover the whole site. Tell us what is on each cable and we will map the ports for you.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Two letters decide how your business connects to the phone network, and most buyers get them backwards.\u00a0FXO connects to the line coming from your telephone company. FXS connects to the telephone itself.\u00a0Once you know which side of the cable you are on, choosing a VoIP gateway is straightforward \u2014 and picking the wrong one is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2368,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2473","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>FXO vs FXS: Which VoIP Gateway Does Your Business Need? - Vintelecom<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vintelecom.net\/nl\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/\" \/>\n<meta property=\"og:locale\" content=\"nl_NL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"FXO vs FXS: Which VoIP Gateway Does Your Business Need? - Vintelecom\" \/>\n<meta property=\"og:description\" content=\"Two letters decide how your business connects to the phone network, and most buyers get them backwards.\u00a0FXO connects to the line coming from your telephone company. FXS connects to the telephone itself.\u00a0Once you know which side of the cable you are on, choosing a VoIP gateway is straightforward \u2014 and picking the wrong one is [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.vintelecom.net\/nl\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/\" \/>\n<meta property=\"og:site_name\" content=\"Vintelecom\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-06T12:43:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.vintelecom.net\/wp-content\/uploads\/2026\/09\/32S.png\" \/>\n\t<meta property=\"og:image:width\" content=\"816\" \/>\n\t<meta property=\"og:image:height\" content=\"816\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"nickalxiao@gmail.com\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Geschreven door\" \/>\n\t<meta name=\"twitter:data1\" content=\"nickalxiao@gmail.com\" \/>\n\t<meta name=\"twitter:label2\" content=\"Geschatte leestijd\" \/>\n\t<meta name=\"twitter:data2\" content=\"7 minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/\"},\"author\":{\"name\":\"nickalxiao@gmail.com\",\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/#\\\/schema\\\/person\\\/15b8a221fe346bc9d31cd18f04fe6d89\"},\"headline\":\"FXO vs FXS: Which VoIP Gateway Does Your Business Need?\",\"datePublished\":\"2026-10-06T12:43:23+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/\"},\"wordCount\":1041,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.vintelecom.net\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/32S.png\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"nl-NL\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/\",\"url\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/\",\"name\":\"FXO vs FXS: Which VoIP Gateway Does Your Business Need? - Vintelecom\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.vintelecom.net\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/32S.png\",\"datePublished\":\"2026-10-06T12:43:23+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/#breadcrumb\"},\"inLanguage\":\"nl-NL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"nl-NL\",\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.vintelecom.net\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/32S.png\",\"contentUrl\":\"https:\\\/\\\/www.vintelecom.net\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/32S.png\",\"width\":816,\"height\":816},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/blog\\\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.vintelecom.net\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"FXO vs FXS: Which VoIP Gateway Does Your Business Need?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/#website\",\"url\":\"https:\\\/\\\/www.vintelecom.net\\\/\",\"name\":\"Vintelecom\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.vintelecom.net\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"nl-NL\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/#organization\",\"name\":\"Vintelecom\",\"url\":\"https:\\\/\\\/www.vintelecom.net\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"nl-NL\",\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.vintelecom.net\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/logo.png\",\"contentUrl\":\"https:\\\/\\\/www.vintelecom.net\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/logo.png\",\"width\":251,\"height\":34,\"caption\":\"Vintelecom\"},\"image\":{\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.vintelecom.net\\\/#\\\/schema\\\/person\\\/15b8a221fe346bc9d31cd18f04fe6d89\",\"name\":\"nickalxiao@gmail.com\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"nl-NL\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6978bfedfa6e5c090263cf6ae816647d97b380d32e3ca69447eb0217e2530aa5?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6978bfedfa6e5c090263cf6ae816647d97b380d32e3ca69447eb0217e2530aa5?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/6978bfedfa6e5c090263cf6ae816647d97b380d32e3ca69447eb0217e2530aa5?s=96&d=mm&r=g\",\"caption\":\"nickalxiao@gmail.com\"},\"sameAs\":[\"http:\\\/\\\/vintelecom.net\"],\"url\":\"https:\\\/\\\/www.vintelecom.net\\\/nl\\\/author\\\/nickalxiaogmail-com\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"FXO vs FXS: Which VoIP Gateway Does Your Business Need? - Vintelecom","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.vintelecom.net\/nl\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/","og_locale":"nl_NL","og_type":"article","og_title":"FXO vs FXS: Which VoIP Gateway Does Your Business Need? - Vintelecom","og_description":"Two letters decide how your business connects to the phone network, and most buyers get them backwards.\u00a0FXO connects to the line coming from your telephone company. FXS connects to the telephone itself.\u00a0Once you know which side of the cable you are on, choosing a VoIP gateway is straightforward \u2014 and picking the wrong one is [&hellip;]","og_url":"https:\/\/www.vintelecom.net\/nl\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/","og_site_name":"Vintelecom","article_published_time":"2026-10-06T12:43:23+00:00","og_image":[{"width":816,"height":816,"url":"https:\/\/www.vintelecom.net\/wp-content\/uploads\/2026\/09\/32S.png","type":"image\/png"}],"author":"nickalxiao@gmail.com","twitter_card":"summary_large_image","twitter_misc":{"Geschreven door":"nickalxiao@gmail.com","Geschatte leestijd":"7 minuten"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/#article","isPartOf":{"@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/"},"author":{"name":"nickalxiao@gmail.com","@id":"https:\/\/www.vintelecom.net\/#\/schema\/person\/15b8a221fe346bc9d31cd18f04fe6d89"},"headline":"FXO vs FXS: Which VoIP Gateway Does Your Business Need?","datePublished":"2026-10-06T12:43:23+00:00","mainEntityOfPage":{"@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/"},"wordCount":1041,"commentCount":0,"publisher":{"@id":"https:\/\/www.vintelecom.net\/#organization"},"image":{"@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/#primaryimage"},"thumbnailUrl":"https:\/\/www.vintelecom.net\/wp-content\/uploads\/2026\/09\/32S.png","articleSection":["Blog"],"inLanguage":"nl-NL","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/","url":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/","name":"FXO vs FXS: Which VoIP Gateway Does Your Business Need? - Vintelecom","isPartOf":{"@id":"https:\/\/www.vintelecom.net\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/#primaryimage"},"image":{"@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/#primaryimage"},"thumbnailUrl":"https:\/\/www.vintelecom.net\/wp-content\/uploads\/2026\/09\/32S.png","datePublished":"2026-10-06T12:43:23+00:00","breadcrumb":{"@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/#breadcrumb"},"inLanguage":"nl-NL","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/"]}]},{"@type":"ImageObject","inLanguage":"nl-NL","@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/#primaryimage","url":"https:\/\/www.vintelecom.net\/wp-content\/uploads\/2026\/09\/32S.png","contentUrl":"https:\/\/www.vintelecom.net\/wp-content\/uploads\/2026\/09\/32S.png","width":816,"height":816},{"@type":"BreadcrumbList","@id":"https:\/\/www.vintelecom.net\/blog\/fxo-vs-fxs-which-voip-gateway-does-your-business-need\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.vintelecom.net\/"},{"@type":"ListItem","position":2,"name":"FXO vs FXS: Which VoIP Gateway Does Your Business Need?"}]},{"@type":"WebSite","@id":"https:\/\/www.vintelecom.net\/#website","url":"https:\/\/www.vintelecom.net\/","name":"Vintelecom","description":"","publisher":{"@id":"https:\/\/www.vintelecom.net\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.vintelecom.net\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"nl-NL"},{"@type":"Organization","@id":"https:\/\/www.vintelecom.net\/#organization","name":"Vintelecom","url":"https:\/\/www.vintelecom.net\/","logo":{"@type":"ImageObject","inLanguage":"nl-NL","@id":"https:\/\/www.vintelecom.net\/#\/schema\/logo\/image\/","url":"https:\/\/www.vintelecom.net\/wp-content\/uploads\/2025\/07\/logo.png","contentUrl":"https:\/\/www.vintelecom.net\/wp-content\/uploads\/2025\/07\/logo.png","width":251,"height":34,"caption":"Vintelecom"},"image":{"@id":"https:\/\/www.vintelecom.net\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.vintelecom.net\/#\/schema\/person\/15b8a221fe346bc9d31cd18f04fe6d89","name":"nickalxiao@gmail.com","image":{"@type":"ImageObject","inLanguage":"nl-NL","@id":"https:\/\/secure.gravatar.com\/avatar\/6978bfedfa6e5c090263cf6ae816647d97b380d32e3ca69447eb0217e2530aa5?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/6978bfedfa6e5c090263cf6ae816647d97b380d32e3ca69447eb0217e2530aa5?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/6978bfedfa6e5c090263cf6ae816647d97b380d32e3ca69447eb0217e2530aa5?s=96&d=mm&r=g","caption":"nickalxiao@gmail.com"},"sameAs":["http:\/\/vintelecom.net"],"url":"https:\/\/www.vintelecom.net\/nl\/author\/nickalxiaogmail-com\/"}]}},"_links":{"self":[{"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/posts\/2473","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/comments?post=2473"}],"version-history":[{"count":1,"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/posts\/2473\/revisions"}],"predecessor-version":[{"id":2474,"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/posts\/2473\/revisions\/2474"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/media\/2368"}],"wp:attachment":[{"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/media?parent=2473"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/categories?post=2473"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vintelecom.net\/nl\/wp-json\/wp\/v2\/tags?post=2473"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}