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- Description
- Specifications
The PVDM2-8 is the Cisco 8-channel packet fax and voice DSP module, the smallest in the PVDM2 range. At most 8 channels run with the G.711 codec, and the count drops to 4 channels with high-complexity codecs and 4 channels with medium-complexity codecs.
Its DSP is a Texas Instruments TNETV2505GGW at 175 MHz, with 128-megabit synchronous DRAM, which differs from the TNETV2510GGW used on the 16-, 32-, 48- and 64-channel modules. The PVDM2-8 connects to the host through an 80-pin SIMM interface, and the module is field insertable and removable.
The PVDM2-8 handles compression, voice activity detection, jitter management and echo cancellation. Echo cancellation complies with ITU-T G.168 and covers a 64 ms tail. Conferencing and transcoding are available in conjunction with host software.
Hosts for the PVDM2-8 are the NM-HDV2, NM-HDV2-1T1/E1 and NM-HDV2-2T1/E1 network modules; Cisco 2801, 2811, 2821, 2851, 3825 and 3845 routers; and the EVM-HD-8FXS/DID, EM-HDA-8FXS and EM-4BRI-NT/TE modules. Cisco 2901, 2911, 2921, 2951, 3925 and 3945 routers use the module with the PVDM2-ADPTR adapter. The spare is ordered as PVDM2-8=.
Step up to the PVDM2-16 for 16 G.711 channels. Voice DSP modules and the cards that use them are grouped in Cisco interface cards.
| Part number | PVDM2-8 (spare PVDM2-8=) |
| Type | 8-channel packet fax and voice DSP module |
| Channels, G.711 | 8 |
| Channels, high-complexity codecs | 4 |
| Channels, medium-complexity codecs | 4 |
| DSP | Texas Instruments TNETV2505GGW, 175 MHz |
| DSP external memory | 128-megabit SDRAM |
| Interface | 80-pin SIMM |
| Echo cancellation | software, ITU-T G.168, 64 ms tail |
| Compatible with | NM-HDV2, NM-HDV2-1T1/E1, NM-HDV2-2T1/E1, Cisco 2801, 2811, 2821, 2851, 3825, 3845, EVM-HD-8FXS/DID, EM-HDA-8FXS, EM-4BRI-NT/TE; 2901, 2911, 2921, 2951, 3925, 3945 with PVDM2-ADPTR |