C-7
Cisco 1760 Modular Access Router Hardware Installation Guide
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AppendixC Installing and Upgrading Memory and Packet Voice Data Modules
Installing a PVDM
FigureC-5 Installing a SIMM
Installing a PVDM
You can install up to two PVDMs to support enhanced versions of digital signal
processors (DSPs).
There are five types of PVDMs:
•PVDM-256K-4—Supports one DSP
•PVDM-256K-8—Supports up to two DSPs
•PVDM-256K-12—Supports up to three DSPs
•PVDM-256K-16—Supports up the four DSPs
•PVDM-256K-20—Supports up to five DSPs
Each DSP supports two analog voice ports or one ISDN BRI port. Each analog
VIC used with the Cisco1760 router has two voice ports and requires a single
DSP. The 2-port ISDNVoice-BRI requires two DSPs. Tabl e C-1 shows the
possible combinations of PVDMs and voice ports for the Cisco1760 router.
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1. Insert the SIMM into the socket at an angle 45˚ from vertical.
The socket guide posts insert
through the SIMM holes
(on both sides).
3.
The locking spring will
clip the front side of the SIMM
when it is fully installed
(on both sides).
4.

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2. Push the SIMM down and forward.