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- Description
- Specifications
The PVDM3-256 is the largest Cisco PVDM3 packet voice DSP module, with 256 channels in low-complexity codecs, 192 in medium-complexity codecs and 120 in high-complexity codecs. It is one of the high-end modules, with the PVDM3-192, for scalable rich-media applications.
One PVDM3-256 supports up to 60 secure iLBC TDM-IP voice sessions and up to 30 eight-party conferences with the G.722 wideband codec. For conferencing it supports up to 6 conferences with 64 participants each, or up to 66 conferences with 8 participants each, and it also does universal transcoding and transrating.
Density is up to four times that of a PVDM2. As an example, the smaller PVDM3-64 supports 42 medium-complexity codecs against 32 on a PVDM2-64. The module plugs into a 240-pin DIMM interface, and each DSP has 512-megabit DDR SDRAM.
Cisco 2900 and 3900 Series integrated services routers take it, but the Cisco 2800 and 3800 Series do not. The 2901 and 2911 have 2 PVDM slots, the 2921 and 2951 have 3, and the 3925 and 3945 have 4. The spare number is PVDM3-256=. More voice modules are in Cisco interface cards.
| Part number | PVDM3-256 |
| Spare number | PVDM3-256= |
| Type | Cisco 256-channel packet voice DSP module |
| Channels | 256 low-complexity, 192 medium-complexity, 120 high-complexity |
| Secure voice | Up to 60 iLBC TDM-IP sessions |
| Conferencing | Up to 30 eight-party G.722 conferences; 6 x 64 participants or 66 x 8 participants |
| Interface | 240-pin DIMM |
| DSP memory | 512-megabit DDR SDRAM per DSP |
| Echo cancellation | ITU-T G.168, 128 ms tail |
| Sibling modules | PVDM3-16, PVDM3-32, PVDM3-64, PVDM3-128, PVDM3-192 |
| Compatible with | Cisco 2901, 2911, 2921, 2951, 3925, 3945, 3925-E, 3945-E; not 2800 or 3800 Series |