3Com VCX v7111 User Manual page 389

Input Gain Control
Fax/Modem Relay
Fax Relay
Modem Transparency
Protocols
VoIP Signaling Protocol
Communication Protocols
Line Signaling Protocols Loop start
Processor
Control Processor
Control Processor
Memory
Signal Processors
Interfaces
FXS Telephony Interface 2, 4 or 8 Analog FXS phone or fax ports, loop start (RJ-11)
FXO Telephony Interface 4 or 8 Analog FXO PSTN/PBX loop start ports
Combined FXS / FXO
Network Interface
RS-232 Interface
Indicators
Lifeline
Connectors & Switches
Rear Panel
8 Analog Lines (V7111 18
PORT)
4 Analog Lines (V7111 14
PORT)
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3Com VCX V7111 VoIP Gateway User Guide
-32 dB to +31 dB in steps of 1 dB
Group 3 fax relay up to 14.4 kbps with auto fallback
T.38 compliant, real time fax relay
Tolerant network delay (up to 9 seconds round trip)
Auto switch to PCM or ADPCM on V.34 or V.90 modem detection
SIP RFC 3261
RTP/RTCP packetization.
IP stack (UDP, TCP, RTP).
Remote Software load (TFTP, HTTP and HTTPS).
Motorola PowerQUICC 870
SDRAM - 32 MB
3Com AC482 VoIP DSP
V7111 18 PORT 4 FXS + 4 FXO ports; V7111 14 PORT 2 FXS + 2 FXO ports
10/100 Base-TX
RS-232 Terminal Interface (requires a DB-9 to PS/2 adaptor).
Channel status and activity LEDs
The Lifeline provides a wired analog POTS phone connection to any PSTN or
PBX FXS port when there is no power, or the network fails.
Combined FXS/FXO gateways provide a Lifeline connection available on all
FXS ports.
The Lifeline splitter (for FXS gateways) is a special order option.
8 RJ-11 connectors
4 RJ-11 connectors
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