{"product_id":"zyxel-c4000bz","title":"Zyxel C4000BZ Bonded DSL WiFi 6 Modem Router | CenturyLink, Brightspeed","description":"\u003cdiv class=\"mg-desc\"\u003e\n\n\u003cp\u003eThe Zyxel C4000BZ is a bonded DSL modem and WiFi 6 router in one unit, built for CenturyLink and Brightspeed internet service. Bonded DSL uses two phone lines together to carry more speed than one line can. CenturyLink lists the C4000BZ among its recommended modems, and Brightspeed lists it as a certified modem.\u003c\/p\u003e\n\n\u003ch2\u003eQuick Specs\u003c\/h2\u003e\n\u003ctable class=\"mg-specs\"\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eModel\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003eZyxel C4000BZ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eType\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003eBonded line DSL modem and WiFi 6 router\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eDSL\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003eADSL and VDSL2 (profiles 8a, 12a, 17a) with vectoring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eTested Speed\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003eUp to 140 Mbps on bonded VDSL2 and up to 40 Mbps on bonded ADSL, as tested by CenturyLink\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eWiFi\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003eWiFi 6 (802.11ax), dual band, 2x2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eWiFi Speeds\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003eUp to 600 Mbps on 2.4 GHz and up to 2.4 Gbps on 5 GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eEthernet\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003e5 Gigabit ports: 4 LAN and 1 WAN\/LAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eSecurity\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003eWPA3, guest network, automatic firmware updates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eAntennas\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003e4 internal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eSize\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003e8.3 in tall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eWeight\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003e1.59 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd data-label=\"Spec\"\u003eWorks With\u003c\/td\u003e\n\u003ctd data-label=\"Detail\"\u003eCenturyLink and Brightspeed bonded DSL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eBuilt for Two-Line (Bonded) DSL\u003c\/h2\u003e\n\u003cp\u003eThe C4000BZ is the bonded line model in the Zyxel C4000 series. A bonded plan runs over two phone lines at once, and the modem combines them into one faster connection. CenturyLink has tested the C4000BZ at up to 140 Mbps on bonded VDSL2. The speed you get depends on your plan and the condition of your lines.\u003c\/p\u003e\n\u003cp\u003eIf your service uses one line, choose a single-line model instead, such as the \u003ca href=\"\/products\/greenwave-c4000lg\"\u003eC4000LG\u003c\/a\u003e or the \u003ca href=\"\/products\/greenwave-c4000lz\"\u003eC4000LZ\u003c\/a\u003e. Your provider can tell you whether your plan is bonded.\u003c\/p\u003e\n\n\u003ch2\u003eDual-Band WiFi 6 Built In\u003c\/h2\u003e\n\u003cp\u003eThe C4000BZ has a dual-band WiFi 6 router built in, so one box handles both the DSL connection and your home WiFi. It supports 160 MHz channels on 5 GHz for speeds up to 2.4 Gbps between the modem and WiFi 6 devices, and it works with older WiFi devices too. WPA3 security and a separate guest network are included.\u003c\/p\u003e\n\u003cp\u003eFor a large or multi-story home, add a \u003ca href=\"\/collections\/mesh-network-systems\"\u003emesh network system\u003c\/a\u003e to one of the Ethernet ports.\u003c\/p\u003e\n\n\u003ch2\u003eFive Gigabit Ethernet Ports\u003c\/h2\u003e\n\u003cp\u003eFour Gigabit LAN ports connect wired devices such as a desktop computer, game console, smart TV, or network switch. A fifth Gigabit port works as either a WAN or a LAN port.\u003c\/p\u003e\n\n\u003ch2\u003eC4000BZ vs C4000BG\u003c\/h2\u003e\n\u003cp\u003eBoth are bonded-line C4000 modems with WiFi 6, and CenturyLink recommends both. The C4000BZ is made by Zyxel. The \u003ca href=\"\/products\/greenwave-c4000bg\"\u003eC4000BG\u003c\/a\u003e is sold under the Greenwave and Axon names. Either one fits a two-line CenturyLink or Brightspeed plan.\u003c\/p\u003e\n\n\u003ch2\u003eProvider Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenturyLink:\u003c\/strong\u003e on CenturyLink's recommended modem list for bonded DSL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrightspeed:\u003c\/strong\u003e on Brightspeed's certified modem list as part of the C4000 series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiber service:\u003c\/strong\u003e CenturyLink does not list the C4000BZ for fiber. For CenturyLink Fiber, see the \u003ca href=\"\/products\/centurylink-c4000xg\"\u003eC4000XG\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable internet:\u003c\/strong\u003e not compatible. This is a DSL modem.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCall your provider before you order to confirm the C4000BZ fits your plan and line type. You can also browse all \u003ca href=\"\/collections\/centurylink\"\u003eCenturyLink compatible modems\u003c\/a\u003e and \u003ca href=\"\/collections\/brightspeed-dsl\"\u003eBrightspeed compatible modems\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eDoes the Zyxel C4000BZ work with CenturyLink?\u003c\/h3\u003e\n\u003cp\u003eYes. CenturyLink lists the C4000BZ among its recommended modems for bonded DSL service.\u003c\/p\u003e\n\n\u003ch3\u003eDoes the Zyxel C4000BZ work with Brightspeed?\u003c\/h3\u003e\n\u003cp\u003eYes. Brightspeed lists the C4000BZ as a certified modem in its C4000 series.\u003c\/p\u003e\n\n\u003ch3\u003eIs the C4000BZ for bonded or single-line DSL?\u003c\/h3\u003e\n\u003cp\u003eIt is a bonded line modem, made for plans that use two phone lines. For single-line service, choose the C4000LG or C4000LZ.\u003c\/p\u003e\n\n\u003ch3\u003eDoes the C4000BZ have WiFi 6?\u003c\/h3\u003e\n\u003cp\u003eYes. It has dual-band WiFi 6 with speeds up to 600 Mbps on 2.4 GHz and up to 2.4 Gbps on 5 GHz.\u003c\/p\u003e\n\n\u003ch3\u003eHow fast is the Zyxel C4000BZ?\u003c\/h3\u003e\n\u003cp\u003eCenturyLink has tested it at up to 140 Mbps on bonded VDSL2 and up to 40 Mbps on bonded ADSL. Your speed depends on your plan and your lines.\u003c\/p\u003e\n\n\u003ch3\u003eDoes the C4000BZ work with cable internet?\u003c\/h3\u003e\n\u003cp\u003eNo. It is a DSL modem and does not connect to a cable (coax) line.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\u003cstyle\u003e\n.mg-desc{color:inherit;}\n.mg-desc h2{font-size:24px !important;line-height:1.25 !important;margin:28px 0 12px !important;color:inherit;}\n.mg-desc h3{font-size:19px !important;line-height:1.3 !important;margin:22px 0 8px !important;color:inherit;}\n.mg-desc p,.mg-desc li{font-size:17px !important;line-height:1.6 !important;color:inherit;}\n.mg-desc ul,.mg-desc ol{padding-left:22px;margin:0 0 12px;}\n.mg-desc a{color:inherit;text-decoration:underline;}\n.mg-desc .mg-specs{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:16px;}\n.mg-desc .mg-specs td{padding:10px 12px;border:1px solid rgba(128,128,128,0.35);vertical-align:top;line-height:1.45;color:inherit;font-size:16px !important;}\n.mg-desc .mg-specs td:first-child{font-weight:700;width:34%;background:rgba(128,128,128,0.08);}\n.mg-desc .mg-included{border:1px solid rgba(128,128,128,0.35);border-radius:8px;padding:6px 18px 10px;margin:24px 0;background:rgba(128,128,128,0.06);}\n.mg-desc .mg-included h3{margin-top:12px !important;}\n@media (max-width:768px){\n.mg-desc h2{font-size:22px !important;}\n.mg-desc p,.mg-desc li{font-size:16px !important;}\n.mg-desc .mg-specs,.mg-desc .mg-specs tbody,.mg-desc .mg-specs tr,.mg-desc .mg-specs td{display:block;width:100%;}\n.mg-desc .mg-specs tr{border:1px solid rgba(128,128,128,0.35);border-radius:8px;margin:0 0 10px;overflow:hidden;}\n.mg-desc .mg-specs td{border:none;font-size:15px !important;padding:8px 12px;}\n.mg-desc .mg-specs td:first-child{width:100%;}\n.mg-desc .mg-specs td::before{content:attr(data-label);display:block;font-size:12px;letter-spacing:0.06em;text-transform:uppercase;opacity:0.65;font-weight:600;margin-bottom:2px;}\n}\n\u003c\/style\u003e","brand":"Zyxel","offers":[{"title":"Default Title","offer_id":50636963217494,"sku":"DMR426A-FBA","price":120.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0582\/9463\/2534\/files\/CopyofUntitledDesign_34_6d3a2ac2-166c-44d3-ad28-8673c134d678.png?v=1793379124","url":"https:\/\/www.modemguides.com\/products\/zyxel-c4000bz","provider":"ModemGuides","version":"1.0","type":"link"}