Specifications

System Specifications 3-43
Cisco IGX 8400 Series Family
Voice service modules Channelized voice and data module (CVM)
32-, 24- and 16-Kbps ADPCM voice compression (ITU G.721, G.723 and
G.726)
Voice activity detection (VAD)
Integrated FAX/high-speed modem detection and optional echo
cancellation
Supports T1, E1, J1 interfaces
Universal voice module (UVM)
32 Kbps, 24 Kbps ADPCM and 16 Kbps LD-CELP voice compression
(ITU G.721, G.723, and G.728)
Voice activity detection (VAD)
On board echo cancellation.
Fax and modem tone detection
Supports T1,E1, and J1 interfaces
Circuit switched data service
modules
High-speed data module (HDM)
Up to 4 channels, each up to 1.344 Mbps
Supports EIA/TIA-232, V.35, EIA/TIA-422, EIA/TIA-449, X.21/V.36
interfaces
Repetitive pattern suppression (RPS) to 128 Kbps
Low-speed data module (LDM)
Up to 8 channels
Supports EIA/TIA-232 interface
Repetitive pattern suppression to 19.2 Kbps
Table 3-28 GX 8400 Series Physical Specifications (Continued)
Characteristic Description