Appendix C Installing and Upgrading Memory and Packet Voice Data Modules
Installing a PVDM
C-8
Cisco 1760 Modular Access Router Hardware Installation Guide
78-13342-03
The Cisco 1760 router has two PVDM slots. Any of the PVDMs can occupy either
slot. The total number of DSPs provided by one or two PVDMs installed in those
slots must be greater than or equal to the number of DSPs required by the number
and type of VICs installed, as described in
Table C-1
.
For example, if you have one PVDM (a single DSP), and you want to increase the
number of DSPs to 3, you can either add a PVDM-256K-8 in the second slot or
replace the PVDM-256K-4 with a PVDM-256K-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
Figure C-3
.)
Step 2
Remove any existing PVDM modules by pulling the PVDM snaps away from the
module. (See
Figure C-6
.)
Table C-1
PVDM and VIC Combinations
PVDM
Number
of DSPs
Supported VIC Combinations
PVDM-256K-4
1
1 analog VIC
PVDM-256K-8
2
Up to 2 analog VICs or
1 voice-BRI VIC
PVDM-256K-12
3
Up to 3 analog VICs or
1 analog VIC and 1 voice-BRI VIC
PVDM-256K-16
4
Up to 4 analog VICs or
Up to 2 voice-BRI VICs or
Up to 2 analog VICs and 1 voice-BRI VIC
PVDM-256K-20
5
Up to 4 analog VICs or
Up to 2 voice-BRI VICs or
Up to 3 analog VICs and 1 voice-BRI VIC or
1 analog VIC and up to 2 voice-BRI VICs