This document is an update of the MOSA 4491 User Manual, providing safety instructions and step-by-step guides for basic configuration and function configuration.
This manual describes the MOSA 4491 IP‑PBX gateway, its features, hardware layout, and management tools. It guides users through safety precautions, hardware setup, network configuration, and firmware updates.
Key sections include safety instructions, package contents, panel and connector details, LED indicators, network management options, dialing flow charts, and a full specification table covering voice codecs, power, dimensions, and certifications.
| Voice Compression | G711/G729 AB/G723 |
|---|---|
| Silence Suppression | VAD, CNG |
| Echo Cancellation | 165/G168 16 ms |
| Jitter Buffer | Adaptive Jitter buffer Management |
| Gain Control | Im/Out +/-6 dB |
| Packet Time | 40 ms |
| Transport Protocol | RTP RTCP |
| Call Control Protocol | Proprietary |
| Phonebook | Manual input, Automatic |
| Ethernet Ports | 10BASE‑T/100BASE‑TX |
| System Console Interface | 1 |
| Management Tool | Web Browser, Phone set, System Console, Telnet |
| IP Address | Static / DHCP |
| Firmware Update | Web, FTP |
| Power Voltage | 100VAC - 240VAC |
| Power Frequency | 50/60 Hz |
| Power Consumption | 9 W |
| Dimensions | 127 mm × 80 mm × 21 mm |
| Storage Temperature | -10 °C to 70 °C |
| EMI Certification | FCC part 1 Class B, CE Mark |
| PTT Regulation | FCC part 68, NALTE, iD A, JATE |
| Safety Certifications | cUL, CCTB, CB |
Firmware can be updated through the web management interface or via FTP using the built‑in server.
The device supports G711, G729, AB, and G723 voice compression codecs.
It includes an Ethernet port (10BASE‑T/100BASE‑TX with auto‑negotiation via RJ‑43) and an RJ‑45 console port for serial connection.