06-07-2007 06:16 AM - edited 03-13-2019 04:12 PM
What is the best way to find out how many dsp's are in use/reserved on your gateway at a particualr time?
Is there a one to one relationship for dsp's to the number of channels you have?
06-07-2007 06:27 AM
Try "show voice dsp".
The relation between dsp and number of calls, depends on the type of dsp and configuration.
There is a calculator that you can use (CCO registered users only) at:
http://www.cisco.com/cgi-bin/Support/DSP/cisco_prodsel.pl
Hope this helps, please rate post if it does!
06-07-2007 10:18 PM
Hello,
Actually, when you buy PVDMs for a router, you will have a part number like this "PVDM2-16", this PVDM contains 1 DSP 16 channels each DSP (16x1= 16 Channels), this happens with PVDM2s because each DSP on those models contains 16 Channels (exception, the PVDM2-8 contains 1 DSP of 8 Channels).
Here is the Table:
PVDM2-8 8-Channel 1 DSP (TNETV2505GGW) Module
PVDM2-16 16-Channel 1 DSP (TNETV2510GGW) Module
PVDM2-32 32-Channel 2 DSP (TNETV2510GGW) Module
PVDM2-48 48-Channel 3 DSP (TNETV2510GGW) Module
PVDM2-64 64-Channel 4 DSP (TNETV2510GGW) Module
We have PVDM2-8, -16, -32, -48 & -64; you just need to do the math in order to know the amount of channels per DSP.
Packet Fax or Voice DSP Modules: http://cisco.com/en/US/partner/products/hw/modules/ps2797/products_installation_guide_chapter09186a008007c8ea.html#wp1033936
High-Density Packet Voice Digital Signal Processor Modules: http://cisco.com/en/US/partner/products/hw/modules/ps3115/products_data_sheet0900aecd8016e845.html
In regards to normal PVDMs:
PVDM-4 = 1DSP x 4CH/ DSP = 4 CH
PVDM-8 = 2DSP x 4CH/ DSP = 8 CH
PVDM-12 = 3DSP x 4CH/ DSP = 12 CH
PVDM-16 = 4DSP x 4CH/ DSP = 16 CH
PVDM-20= 5DSP x 4CH/ DSP = 20 CH
It is exactly the same math, but you have half the amount of channels per DSP.
By the way, the router allocates the DSP resources at boot up and if I remember properly, on PVDM2s, it won't allow you to add more Conf/Xcode sessions that the ones that are available.
You can issue the "show voice dsp" command in order to see the channels that are being used per DSP on PVDM2s, and check this link for DSP troubleshooting/information commands:
http://cisco.com/en/US/partner/products/hw/modules/ps2617/products_tech_note09186a008039c316.shtml
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