Why does my PVDM DSP not show up.

So you have aquired a router with the hope of learning Cisco Voice basics.

My personal favourite for these at the moment is the 1760 19" unit. They are a little more upto date than the 2600's and have space for 4 cards without the need for a carrier module.

Now, unlike the 2600 whos carrier module for voice has built in DSP's the 1760 does not.

You will see on the front pannel of the 1760 to the right of the Power and OK lamps are two lamps labled PVDM 0 and PVDM 1. These signal the status of the DSP modules.

For these lamps to come on, two things need to happen.

1) You need to have a PVDM module in the DSP slot.
2) You need an apropriate IOS with the extended voice command set.

Once you have these you should be able to issue the command

Router>sh diag

### OUTPUT CLIPPED ###

Packet Voice DSP Module Slot 0:
Hardware Revision : 3.2
Part Number : 73-6726-01
Board Revision : A0
Deviation Number : 0-0
Fab Version : 03
PCB Serial Number : ICP062200DB
RMA Test History : 00
RMA Number : 0-0-0-0
RMA History : 00
Processor type : 02
Number of DSP's : 1
DSP memory size(in kwords): 256
Type of DSP : TMS320C549
Product (FRU) Number : PVDM-256K-4=
EEPROM format version 4
EEPROM contents (hex):
0x00: 04 FF 40 02 AC 41 03 02 82 49 1A 46 01 42 41 30
0x10: 80 00 00 00 00 02 03 C1 8B 49 43 50 30 36 32 32
0x20: 30 30 44 42 03 00 81 00 00 00 00 04 00 09 02 FF

Packet Voice DSP Module Slot 1:
Not populated

###Output Clipped###

Here you can see my router is polulated in slot 0 with one PVDM-256k-4 ( that's 4 DSP's )

If the light is not on and sh diag does not show an PVDM then you need to physical confirm it's presence. The case of the router can be slid off after releaseing the rear screws. and the memory and pvdm slots shoudl be at the back left ( with the system front facing you.)

Look for the two PVDM slots and confirm a module is inserted, Re-seat the card just in case.

If after that you still can't see the card in IOS then you will need a second PVDM to confirm the system or module is suspect.

Rob