Description
The AudioCodes MediaPack 202B is more than a VoIP adapter — it's a 2-port FXS gateway with a built-in SIP router, firewall, and NAT engine in a compact desktop form factor. Connect two analog phones or fax machines on the FXS side, plug your internet connection into the WAN port, and connect your local devices to the LAN port. The MP202B handles VoIP registration, voice compression, T.38 fax relay, and network routing simultaneously — making it a one-device solution for small offices and branch locations that need both analog phone integration and basic routing in a single unit.
The Telecom Spot Take
The key distinction between the MP202B and the rest of the MediaPack 11x family is the integrated router. Where the MP112 and MP114 are pure analog gateways that sit behind your existing router, the MP202B has its own WAN and LAN ports — it can serve as the edge device connecting a small office to its internet service while simultaneously handling SIP registration and analog device bridging. This makes it particularly well-suited for branch offices, home offices, and small retail locations that don't already have dedicated routing infrastructure. Add dual-core architecture for voice quality under data load, G.168 echo cancellation, and T.38 fax relay, and the MP202B covers the full range of analog telephony needs without requiring a separate router purchase.
Key Features
- 2 FXS ports (loop-start): Connects two analog phones, fax machines, or analog PBX ports directly to a SIP server or hosted VoIP platform.
- Built-in SIP router with WAN + LAN: Integrated router with NAT, firewall, and DHCP — functions as a VoIP gateway and internet router in a single device.
- T.38 fax relay: Group 3 fax relay with automatic voice/fax mode switching per call — reliable fax without a separate gateway.
- G.711, G.723.1, G.726, G.727, G.729AB codecs: Full codec suite including iLBC for maximum compatibility and bandwidth efficiency.
- G.168-2004 echo cancellation: Echo cancellation keeps voice quality clear even when voice and data share the same connection.
- Voice traffic prioritization: Dual-core architecture and QoS prioritization ensure voice calls stay clear when data traffic is high.
- Bridge or router mode: Deploy as a full SIP router (NAT/DHCP) or in bridge mode behind your existing network infrastructure — configurable per site.
- Web-based management: Browser-based configuration with DHCP, NAT, and SIP registration settings accessible from the LAN side.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | MP202B/2S/SIP |
| FXS Ports | 2 × FXS (RJ-11, loop-start) |
| WAN Port | 1 × 10/100Base-TX Ethernet |
| LAN Port | 1 × 10/100Base-TX Ethernet |
| Signaling Protocol | SIP (RFC 3261) |
| Voice Codecs | G.711 (A-law, μ-law), G.723.1, G.726, G.727, G.729A/AB, iLBC |
| Fax | T.38 (Group 3), T.30 passthrough |
| Echo Cancellation | G.168-2004 compliant |
| Router Features | NAT, DHCP, Firewall, Bridge mode, Voice QoS prioritization |
| Dimensions (W × D × H) | 103 mm × 74 mm × 29.5 mm (6.6" × 5.2" × 1.3") |
| Power | External AC adapter, 12VDC output (110/220V AC input) |
| Form Factor | Desktop |
| Vendor | AudioCodes |
Frequently Asked Questions
- How is the MP202B different from the MP112?
- The MP112 is a pure VoIP gateway with a single Ethernet port — it sits behind your existing router and bridges two analog devices to SIP. The MP202B includes a built-in WAN/LAN router with NAT, DHCP, and firewall, so it can act as both the gateway and the internet router for a small office. Choose the MP112 if you already have routing infrastructure; choose the MP202B if you need both analog bridging and basic routing in one device.
- Can the MP202B work in bridge mode without using its router?
- Yes. The MP202B supports bridge mode, which disables NAT and allows it to sit transparently behind your existing router. This gives you the flexibility to use it as a pure VoIP adapter in environments that already have dedicated routing infrastructure.
- Does the MP202B support T.38 fax?
- Yes. T.38 Group 3 fax relay is fully supported on both FXS ports, with automatic mode switching between voice and fax per call.