Description
Two analog lines. One small box. Full SIP connectivity. The AudioCodes MediaPack 112 is one of the most-deployed analog VoIP gateways in the industry — and for good reason. It connects up to two FXS devices (phones, fax machines, or analog PBX ports) directly to your SIP infrastructure, handling all the protocol translation, voice compression, and T.38 fax relay in a compact, desktop unit. The /CER suffix means it ships with an AudioCodes Certificate Authority-signed security certificate for authenticated SIP deployments.
The Telecom Spot Take
The MP112 fills a specific and very common need: organizations migrating to SIP trunking or hosted VoIP that still have analog devices they can't immediately replace. Think fax machines in compliance-sensitive departments, analog phones in break rooms or stairwells, or legacy PBX trunks that need IP connectivity. At two ports, it's the right size for a small office annex, a single department, or a remote location with minimal analog requirements. AudioCodes built the MP112 on the same platform as the rest of the MediaPack 11x family, so it interoperates with Asterisk, BroadSoft, Cisco Unified Communications Manager, Microsoft Teams Direct Routing, and virtually any SIP server on the market. Zero-touch provisioning via TFTP or HTTP makes remote deployment fast and repeatable — no truck roll required to configure the device on-site.
Key Features
- 2 FXS ports (loop-start): Connects two analog devices — phones, fax machines, or analog PBX ports — directly to a SIP network without additional hardware.
- T.38 fax relay: Full T.38 Group 3 fax support up to 14.4 kbps with automatic switching between fax and voice modes — no separate fax gateway needed.
- SIP, H.323, and MGCP support: Works with virtually every unified communications platform — hosted or on-premises. SIP RFC 3261 is the primary protocol for this SKU.
- G.711, G.723.1, G.726, G.729A voice codecs: Multiple codec choices let you optimize for voice quality or bandwidth depending on your network conditions.
- G.168-2004 echo cancellation: Up to 128 ms tail-length echo cancellation delivers clean, natural call quality on even longer analog loops.
- Zero-touch provisioning: Deploys remotely via TFTP or HTTP — configure once in your provisioning server, ship to site, and the unit self-configures on first boot.
- Stand Alone Survivability (SAS): Maintains basic call functionality during WAN outages, keeping analog devices operational even if the SIP server is unreachable.
- Caller ID support: Compatible with Bellcore GR-30, ETSI Type 1, NTT, and multiple international Caller ID standards.
- AudioCodes Certificate Authority signed (/CER): Ships with an AudioCodes CA-signed security certificate for authenticated SIP server connections.
- Web-based management: Intuitive browser-based configuration interface with SNMP support for enterprise network management integration.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | MP112/2S/SIP/CER |
| FXS Ports | 2 × FXS (loop-start) |
| Network Interface | 1 × 10/100Base-T Ethernet |
| Signaling Protocols | SIP (RFC 3261), H.323 v4, MGCP (RFC 3435) |
| Voice Codecs | G.711 (A-law, μ-law), G.723.1, G.726, G.729A/AB |
| Fax | T.38 (Group 3, up to 14.4 kbps), T.30 passthrough |
| DTMF | RFC 2833, SIP INFO, In-band |
| Echo Cancellation | G.168-2004, up to 128 ms tail length |
| Voice Quality | VAD, CNG, Dynamic Jitter Buffer |
| QoS | IEEE 802.1p/Q VLAN, DiffServ/TOS, RTCP-XR |
| Management | Web GUI, TFTP, HTTP/HTTPS, SNMP, Auto-provisioning |
| Caller ID | Bellcore GR-30 (Bell 202 FSK), ETSI Type 1, NTT, international variants |
| Ring Voltage | 54 VRMS typical (balanced ringing) |
| Ring Frequency | 25–100 Hz |
| Max Ringer Load | REN 3 |
| Dimensions (W × D × H) | 22 cm × 17.2 cm × 4.2 cm (8.7" × 6.8" × 1.7") |
| Weight | Approx. 0.5 kg (1.1 lbs) |
| Power | External AC adapter (included) |
| Certifications | FCC, CE, AudioCodes CA Certificate (/CER) |
| Vendor | AudioCodes |
Frequently Asked Questions
- What devices can I connect to the MP112?
- Any standard analog device that connects via FXS — analog telephones, fax machines, cordless phone base stations, or an FXS port on a legacy PBX or key system. The MP112 acts as the bridge between those devices and your SIP server or hosted VoIP service.
- Does the MP112 support T.38 fax?
- Yes. The MP112 supports T.38 Group 3 fax relay up to 14.4 kbps and automatically switches between fax and voice modes per call. This is the standard that ensures reliable fax transmission over IP networks.
- What does the /CER suffix mean?
- The /CER variant ships with a security certificate signed by the AudioCodes Certificate Authority. This is required by some SIP servers and hosted platforms that enforce certificate-based device authentication.
- Is the MP112 compatible with Microsoft Teams Direct Routing or BroadSoft?
- Yes. AudioCodes has tested and certified the MediaPack 11x series against leading SIP platforms including Asterisk, BroadSoft BroadWorks, Cisco UCM, and Microsoft Teams Direct Routing SBCs. Contact us if you need to verify compatibility with a specific platform.
- What is Stand Alone Survivability (SAS)?
- SAS allows the MP112 to maintain basic call routing between locally registered devices during a WAN outage or SIP server failure. Analog devices connected to the gateway can still reach each other and, in many configurations, reach the PSTN directly — keeping communications alive when your network connection goes down.