3Com VCX V7122 SIP, User Manual

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3Com VCX V7122/SIP VoIP Gateway User Manual
139
C
HAPTER
8: S
PECIFICATIONS
VCX V7122/SIP Specifications
Table 29
VCX V7122/SIP Specifications
Function Specification
VCX V7122/SIP Trunk and Channel Capacity
Capacity with E1 1, 2, 4, 8, or 16 E1 spans, 30, 60, 120, 240, or 480 digital channels
Capacity with T1 1, 2, 4, 8, or 16 T1 spans, 24, 48, 96, 192, or 384 digital channels
Voice and Tone Characteristics
Voice Compression
G.711 PCM at 64 Kbps
µ
-law/A-law
G.723.1 MP-MLQ/ ACELP at 6.3/5.3 Kbps
G.726/G.727 16 – 40 Kbps ADPCM and E-ADPCM
G.729A CS-ACELP at 8 Kbps
NetCoder at 6.4 – 9.6 Kbps, 800 bps increments (3Com proprietary coder)
Silence
Suppression G.723.1 Annex A
G.729 Annex B
PCM and ADPCM: 3Com Proprietary Voice Activity Detection (VAD) and Comfort
Noise Generation (CNG)
NetCoder
Echo Cancellation G.168, 32 ms
DTMF Detection
and Generation Dynamic range 0 to -25 dBm compliant with TIA 464B and Bellcore TR-NWT-
000506.
DTMF Transport Mute, transfer in RTP payload, or relay in compliance with RFC 2833
Call Progress Tone
Detection and
Generation 15 tones: single tone or dual tones, programmable frequency, and amplitude; 16
frequencies in the range 300 – 2000 Hz, 1 or 2 cadences per tone, up to two sets
of on/off periods.
Output Gain Control -31 dB to +31 dB in steps of 1 dB
Input Gain Control -31 dB to +31 dB in steps of 1 dB