--- product_id: 49551539 title: "Synway SMG1004B-2S2O 4 Port Analog Telephone Adapter 2 Port FXS+2 Port FXO VoIP IP Gateway T.38 FAX SIP Asterisk Lync FreePBX Compliant Free Technical Lifetime Warranty" brand: "brand: synway" price: "VT73060" currency: VUV in_stock: false url: https://www.desertcart.vu/products/49551539-synway-smg1004b-2s2o-4-port-analog-telephone-adapter-2-port store_origin: VU region: Vanuatu --- # Synway SMG1004B-2S2O 4 Port Analog Telephone Adapter 2 Port FXS+2 Port FXO VoIP IP Gateway T.38 FAX SIP Asterisk Lync FreePBX Compliant Free Technical Lifetime Warranty **Brand:** brand: synway **Price:** VT73060 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** Synway SMG1004B-2S2O 4 Port Analog Telephone Adapter 2 Port FXS+2 Port FXO VoIP IP Gateway T.38 FAX SIP Asterisk Lync FreePBX Compliant Free Technical Lifetime Warranty by brand: synway - **How much does it cost?** VT73060 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/49551539-synway-smg1004b-2s2o-4-port-analog-telephone-adapter-2-port) ## Best For - brand: synway enthusiasts ## Why This Product - Trusted brand: synway brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description With a simple and economical way to help legacy telephone, fax machine and PBXs interconnect with IP network, Synway SMG1004B analog gateway enables call center and multi-branch enterprises to process powerful, versatile and efficient VoIP solutions with unparalleled cost advantages. SMG1004B Analog Gateway allows for a well-planned, phased migration to an IP network, making the gateways an easy solution for enterprises looking to enhance their legacy PBX equipment with new VoIP access and applications. Connected between a PBX or a LAN, the SMG1004B Gateway converts analog PSTN messages into a format suitable for transmission over standard IP networks. Designed for voicemail and unified messaging applications, SMG 1004B has a 10/100 Base-T Ethernet connection for connecting legacy PBX to a LAN. The analog loop start functionality supports integration via in-band signaling (DTMF or FSK) or serial protocols. The SMG1004B Gateways provide a simple, cost-effective transition to voice and data convergence for enterprises with PBXs. Connected externally, they offer an IP solution that works with current legacy equipment. They support SIP-based applications as well as T.38 for fax transmissions over IP (FoIP). Signaling & Protocol SIP signaling Supported protocol: SIP V1.0/2.0, RFC3261 Audio Encoding & Decoding G.711A 64 kbps G.711U 64 kbps G.729A/B 8 kbps G723 5.3/6.3 kbps G722 64 kbps AMR 4.75 kbps iLBC 13.3/15.2 kbps Sampling Rate 8kHz Safety Lightning resistance Level 4 ## Features - FXS: 2x FXS Ports; FXO: 2x FXO Ports, Support SIP and MGCP Standard Control Protocols - LAN: 1x 100Mbps Port; Telephony Interface: RJ11 - Network: DHCP, DDNS, OpenVPN, PPPoE, Static Route, VLAN, Power Adapter: 100-240V - Compatibility: VOS, 3CX, Asterisk, Lync Server, FreePBX, Elastix, Broadsoft, Mitel and Other Leading PBX, IP-PBX, Softswitches - T.38 Fax Compliant, G.168 128ms Echo Cancellation, DSP-based Toll Quality Voice Compression:G.711/723/722/729/GSM/iLBC ## Images ![Synway SMG1004B-2S2O 4 Port Analog Telephone Adapter 2 Port FXS+2 Port FXO VoIP IP Gateway T.38 FAX SIP Asterisk Lync FreePBX Compliant Free Technical Lifetime Warranty - Image 1](https://images-na.ssl-images-amazon.com/images/I/31RqPKW4MeL.jpg) ![Synway SMG1004B-2S2O 4 Port Analog Telephone Adapter 2 Port FXS+2 Port FXO VoIP IP Gateway T.38 FAX SIP Asterisk Lync FreePBX Compliant Free Technical Lifetime Warranty - Image 2](https://images-na.ssl-images-amazon.com/images/I/31dMM7zDgLL.jpg) ![Synway SMG1004B-2S2O 4 Port Analog Telephone Adapter 2 Port FXS+2 Port FXO VoIP IP Gateway T.38 FAX SIP Asterisk Lync FreePBX Compliant Free Technical Lifetime Warranty - Image 3](https://images-na.ssl-images-amazon.com/images/I/31JL3RXDPmL.jpg) ![Synway SMG1004B-2S2O 4 Port Analog Telephone Adapter 2 Port FXS+2 Port FXO VoIP IP Gateway T.38 FAX SIP Asterisk Lync FreePBX Compliant Free Technical Lifetime Warranty - Image 4](https://images-na.ssl-images-amazon.com/images/I/316UepB7bcL.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/49551539-synway-smg1004b-2s2o-4-port-analog-telephone-adapter-2-port](https://www.desertcart.vu/products/49551539-synway-smg1004b-2s2o-4-port-analog-telephone-adapter-2-port) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-04*