Description
The AudioCodes MediaPack MP508/4O/SIP delivers reliable, high-quality analog-to-VoIP connectivity for enterprises and branch offices. With four FXO ports, it seamlessly bridges traditional PSTN or PBX analog trunks to your SIP-based IP telephony network, IP-PBX, or unified communications solution. You keep using your existing analog lines while gaining the cost savings, flexibility, and advanced features of modern VoIP.
If your business still relies on analog trunks but wants the reliability and savings of SIP, the MP508/4O/SIP is one of the smartest, most future-proof gateways in its class. The four FXO ports give you direct PSTN failover and trunking without replacing your entire telephony infrastructure. Pair it with zero-touch provisioning and you’ll have new sites online in minutes instead of days. We love the dual Gigabit Ethernet ports and optional data routing—they turn this gateway into a true all-in-one branch solution. Perfect for IT teams that need rock-solid interoperability with Microsoft Teams, Zoom, and major SIP providers without the headaches.
Please note: SBC sessions, Direct Routing Teams Integrations, high level features, and access to Audiocodes support may require an additional license or support contract.
Key Features
- 4 FXO ports for direct connection to PSTN lines or PBX analog trunks
- Superior voice quality with G.168 echo cancellation (up to 128 ms tail length), dynamic jitter buffer, silence detection, and comfort noise generation
- Wideband and narrowband voice codecs: G.711, G.723.1, G.729A, G.722
- T.38 compliant real-time fax relay with automatic bypass to PCM
- Comprehensive SIP interoperability with leading UC vendors including Microsoft Teams SIP Gateway and Zoom
- Zero-touch provisioning for rapid, secure large-scale deployments
- Branch survivability with standalone survivability (SAS) and dual network connectivity
- Rich analog features: caller ID, message waiting indication, polarity reversal, metering tones, and distinctive ringing
- Advanced security: SRTP, SIP header manipulation, topology hiding, and call admission control
- Dual Gigabit Ethernet ports (1x WAN + 1x LAN) with IPv6 support and optional data routing
- Easy management via embedded web server, SNMP, SSH, Telnet, and TR-069/TR-104
Technical Specifications
- Telephony Interfaces: 4 FXO (RJ-11) ports (option to add 4 FXS)
- Network Interfaces: 1 × 10/100/1000Base-T WAN, 1 × 10/100/1000Base-T LAN
- Console Port: 1 × RJ-45
- Voice Processing: Echo cancellation (G.168), 3-way conference (on-board), programmable call progress tones, DTMF relay (RFC 2833, SIP INFO/NOTIFY)
- Fax: T.38 real-time fax, automatic bypass
- Power: External AC adapter – Input 100–240 VAC, 50–60 Hz; Output 12 V / 3 A
- Dimensions (H × W × D): 51 × 296 × 160 mm (2 × 11.65 × 6.5 in.)
- Weight: 670 g (1.5 lb)
- Mounting: Desktop, wall-mount, or rack-mount (with optional shelf)
- Operating Environment: 5° to 40°C (41° to 104°F), 10–90% non-condensing humidity
- Certifications: CE, FCC, compliant with UL/EN 62368-1
See Audiocodes MP-5xx datasheet for more information.



