Home / Shop
- Description
- Specifications
The PVDM-256K-8 is a Cisco packet voice and fax DSP module with 2 DSPs. PVDM-256K modules are based on the C549 DSP chipset, and the family runs from the 1-DSP PVDM-256K-4 through the 2-DSP PVDM-256K-8 and 3-DSP PVDM-256K-12 to the 4-DSP PVDM-256K-16HD and 5-DSP PVDM-256K-20HD.
In the Cisco 1760, two DSP slots on the motherboard each take one module, and each module can hold up to five DSPs, for a system maximum of ten DSPs. Every analog voice interface card needs one DSP and every ISDN BRI voice interface card needs two.
Cisco 1700 Series routers, including the 1751 and 1760, can hold 1 or 2 PVDM-256K modules, and the NM-HDV network module can hold up to 5. On hardware conferencing, each DSP provides a single conference bridge for G.711 or G.729 calls, with up to 6 participants per bridge. PVDM-256K and PVDM2-based DSPs use different DSP farm configurations, and only one type can be configured in a router at a time.
The single-DSP PVDM-256K-4 is the module that ships in the Cisco 1760-V. Further voice hardware is in the Cisco interface card category.
| Part number | PVDM-256K-8 |
| Type | packet voice/fax DSP module |
| DSPs | 2 |
| DSP chipset | C549 family |
| Cisco 1760 voice cards | up to 2 analog VIC or 1 ISDN BRI VIC |
| Modules per Cisco 1700 Series router | 1 or 2 |
| Modules per NM-HDV | up to 5 |
| Conference bridge | one per DSP, up to 6 participants, G.711 or G.729 |
| Related sizes | PVDM-256K-4 (1 DSP), PVDM-256K-12 (3 DSPs), PVDM-256K-16HD (4 DSPs), PVDM-256K-20HD (5 DSPs) |
| Compatible with | Cisco 1751, Cisco 1760, NM-HDV |