Description
If your small office or branch still relies on analog phones, fax machines, or an older PBX but you’re ready to move to modern SIP-based VoIP, the AudioCodes MediaPack MP504/2S/SIP gives you the perfect, low-cost bridge. It starts with two FXS ports you can easily upgrade to four through software—no new hardware needed—so you get exactly the analog lines you need today and room to grow tomorrow. Plug in your existing phones or fax, connect to your SIP trunk or IP-PBX, and you’re up and running with crystal-clear calls and reliable faxing.
Please note: Direct Routing Teams Integrations, high level features, and access to Audiocodes support may require an additional license or support contract.
Key Features
- 2 FXS analog ports (software upgradable to 4 FXS) with loop-start signaling for direct connection of analog phones, fax machines, and PBX trunks
- Comprehensive SIP interoperability with leading platforms including Microsoft Teams SIP Gateway, Zoom, Cisco BroadSoft, and major SIP trunks
- Superior voice quality with G.711, G.729A, G.723.1, G.722 codecs, advanced echo cancellation (G.165/G.168), dynamic jitter buffer, and silence suppression
- T.38 real-time fax compliant with automatic fallback to PCM for maximum reliability
- 3-way conference calling with local mixing, Message Waiting Indication (MWI), Caller ID, polarity reversal, and metering tones
- Gigabit Ethernet WAN + LAN ports with IPv6, VLAN tagging, QoS, and optional data routing / firewall capabilities
- Zero-touch provisioning, web management, SNMP, SSH, and full support for AudioCodes One Voice Operation Center
- Standalone survivability for branch continuity during WAN outages
- Compact, fanless design — desktop, wall-mount, or rack-mount ready
Technical Specifications
- Telephony Interfaces: 2 × FXS (RJ-11), loop-start; software upgradable to 4 FXS
- Network Interfaces: 1 × 10/100/1000Base-T WAN (RJ-45), 1 × 10/100/1000Base-T LAN (RJ-45)
- Voice Coders: G.711, G.723.1, G.729A, G.722
- Fax: T.38 compliant (real-time), automatic bypass to PCM
- Echo Cancellation: G.165 & G.168, 64/32/128 ms tail length
- DTMF: In-band, out-of-band (RFC 2833, SIP INFO/NOTIFY)
- Signaling: SIP over UDP, TCP, TLS; IPv6 supported
- Management: Embedded web server, SNMP v2/v3, SSH, Telnet, TR-069/TR-098/TR-181/TR-104, zero-touch provisioning
- Power: External 100–240 VAC / 50–60 Hz adapter, 12 V / 3 A output
- Dimensions (H × W × D): 51 × 296 × 160 mm (2 × 11.65 × 6.3 in)
- Weight: 670 g (1.5 lb)
- Mounting: Desktop, wall mount, rack mount (optional shelf)
- Operating Temperature: 5° to 40°C (41° to 104°F)
- Compliance: ITU-T K.21 surge protection, RoHS
See Audiocodes MP-5xx datasheet for more information.