Description
The AudioCodes MediaPack 114 with four FXO ports is purpose-built for one job: connecting existing PSTN analog trunk lines to your IP network. Organizations that still rely on analog PSTN trunks for incoming calls — or need those trunks for emergency failover — use the MP114/4O to bridge that gap cleanly. With SIP signaling, T.38 fax support, and automatic PSTN fallback built in, it handles four trunk lines simultaneously without complexity or compromise.
The Telecom Spot Take
The all-FXO configuration of the MP114 addresses a scenario that's more common than people expect: an organization has moved to SIP or hosted VoIP for primary calling but still has analog PSTN lines they need to absorb — whether for fax, legacy DID numbers, elevator and door-entry lines, or reliable emergency fallback. The MP114/4O slots into your network between those PSTN trunk lines and your SIP infrastructure, making those analog circuits available as SIP resources. It also works in reverse: if your IP network or SIP provider goes down, the FXO ports provide automatic PSTN fallback so critical calls — especially emergency calls — still connect. At 4 ports in a compact desktop form factor, this is one of the most efficient tools for analog-to-SIP trunk migration available.
Key Features
- 4 FXO ports: Connects up to four PSTN analog trunk lines to your SIP server or hosted VoIP platform — no PSTN gateway appliance needed.
- Automatic PSTN fallback: If your IP network or SIP server fails, the gateway automatically routes calls over PSTN — including E911 emergency calls — for continuous connectivity.
- T.38 fax relay: Group 3 fax relay up to 14.4 kbps on any port, with automatic mode switching per call.
- SIP RFC 3261 primary protocol: Fully compatible with Asterisk, BroadSoft, Cisco UCM, Microsoft Teams Direct Routing, and virtually every SIP-based platform.
- G.729A compression: Reduces voice codec bandwidth significantly compared to G.711, ideal for sites with limited WAN bandwidth across multiple analog trunks.
- Zero-touch provisioning: TFTP/HTTP auto-configuration enables remote deployment without on-site technical staff.
- G.168-2004 echo cancellation: Up to 128 ms tail ensures clean call quality on every PSTN trunk, regardless of loop length.
- AudioCodes CA Certificate (/CER): Factory-signed certificate for authenticated SIP deployments requiring device-level security.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | MP114/4O/SIP/CER |
| FXO Ports | 4 × FXO (PSTN trunk line) |
| 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 |
| PSTN Fallback | Automatic; E911 emergency call routing supported |
| QoS | IEEE 802.1p/Q VLAN, DiffServ/TOS, RTCP-XR |
| Management | Web GUI, TFTP, HTTP/HTTPS, SNMP, Auto-provisioning |
| 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 is an FXO port and what does it connect to?
- An FXO (Foreign Exchange Office) port connects to a PSTN analog trunk line — the kind of line that comes from your telephone company. It's the opposite of an FXS port (which connects to phones). The MP114/4O takes those PSTN lines and makes them available to your SIP phone system.
- Can the MP114/4O handle T.38 fax on PSTN lines?
- Yes. Fax calls arriving on any of the four FXO ports are automatically handled with T.38 fax relay, ensuring reliable transmission over the IP network. The gateway switches between voice and fax modes automatically per call.
- What happens if my SIP server goes offline?
- The MP114/4O supports automatic PSTN fallback — if your SIP server or WAN connection fails, the gateway routes calls directly over the PSTN trunk lines without manual intervention. This includes emergency (E911) calls.