Cisco 1751 User Manual
Page 74
Appendix C Installing and Upgrading Memory and Packet Voice Data Modules
Installing a Packet Voice Data Module
C-8
Cisco 1751 Router Hardware Installation Guide
78-11258-04
For example, if you have one PVDM (a single DSP), and you ant to increase the
number of DSPs to 3, you can either add a PVDM-8 in the second slot, or you can
replace the PVDM-4 with a PVDM-12.
Follow these steps to install a PVDM on the router motherboard:
Warning
During this procedure, wear grounding wrist straps to avoid ESD damage to the
router. Do not directly touch the backplane with your hand or any metal tool, or
you could shock yourself.
Step 1
Locate the PVDM slots on the motherboard. (See
Step 2
Remove any existing PVDMs by pulling the PVDM snaps away from the PVDM.
(See
.)
Step 3
Hold the replacement PVDM with the double-notched edge on your left.
Step 4
Insert the PVDM into the PVDM slot, making sure that the notches on the edge
of the PVDM are inserted over the bars inside the PVDM slot. (See
.)
Table C-1
PVDM and VIC Combinations
PVDM
Number
of DSPs
Supported VIC Combinations
PVDM-4
1
1 analog VIC
PVDM-8
2
Up to 2 analog VICs or
1 voice-BRI VIC
PVDM-12
3
Up to 3 analog VICs or
1 analog VIC + 1 voice-BRI VIC
PVDM-16
4
Up to 3 analog VICs or
Up to 2 voice-BRI VICs or
Up to 2 analog VICs + 1 voice-BRI VIC
PVDM-20
5
Up to 3 analog VICs or
Up to 2 voice-BRI VICs or
Up to 2 analog VICs + 1 voice-BRI VIC or
1 analog VIC + up to 2 voice-BRI VICs