12-10-2007 04:10 AM - edited 03-15-2019 07:41 AM
Hello,
i have one 2851 with 2 E1, i have configured the first when i want to configure the second, the following message is displayed :
Router(config-controller)#pri-group ti
Router(config-controller)#pri-group timeslots 1-31
% Not enough DSP resources available to configure pri-group on controller E1 0/0/1
% The remaining dsp resources are enough for 6 time slots.
% For current codec complexity, 2 extra dsp(s) are required to create this voice port.
when i type sh inventory, i find that i have PVDM2-48
Router#SH INVENtory
NAME: "2851 chassis", DESCR: "2851 chassis"
PID: CISCO2851 , VID: V04 , SN: FCZ1145718B
NAME: "Two port E1 voice interface daughtercard on Slot 0 SubSlot 0", DESCR: "Two port E1 voice interface daughtercard"
PID: VWIC-2MFT-E1 , VID: V02, SN: 36010647
NAME: "2nd generation four port FXO voice interface daughtercard on Slot 0 SubSlot 1", DESCR: "2nd generation four port FXO voice interface daughtercard"
PID: VIC2-4FXO , VID: V02 , SN: FOC11412LLL
NAME: "2nd generation four port FXO voice interface daughtercard on Slot 0 SubSlot 2", DESCR: "2nd generation four port FXO voice interface daughtercard"
PID: VIC2-4FXO , VID: V02 , SN: FOC11401M2Q
NAME: "2nd generation four port FXO voice interface daughtercard on Slot 0 SubSlot 3", DESCR: "2nd generation four port FXO voice interface daughtercard"
PID: VIC2-4FXO , VID: V02 , SN: FOC11412LPY
NAME: "PVDMII DSP SIMM with three DSPs on Slot 0 SubSlot 4", DESCR: "PVDMII DSP SIMM with three DSPs"
PID: PVDM2-48 , VID: V01 , SN: FOC11373EWK
NAME: "AIM Service Engine 0", DESCR: "AIM Service Engine"
PID: AIM-CUE , VID: V03 , SN: FOC114146D6
i don't know if it's suffisant to support 2 ports with 30 channels for everyone.
i wait for your feedback.
thanks
12-10-2007 06:52 AM
With the configuration you have, at minimum you will need 1 PVDM2-48 + 1 PVDM2-16 + 1 PVDM2-8
This is considering G.711 codec. If you are using higher complexity codecs, the DSP requirement will increase.
You can get this calculation using DSP calculator here (Registered users)
http://www.cisco.com/cgi-bin/Support/DSP/cisco_prodsel.pl
The following document will explain some more details
http://www.cisco.com/en/US/products/hw/modules/ps3115/products_qanda_item0900aecd8016c6ad.shtml
12-10-2007 06:57 AM
Given the specifications or hardware requirements for your router platform there are insufficient DSPs as you already know, and the output suggest you require 2 additional DSPs.
For you information a single PVDM2-48 supports 3 DSPs and in order to support your configuration of 2 E1 Pri trunks and 3 4-Port FXO modules you will require 5 DSPs in total for FLEX complexity, this is the absolute minimum.
Therefore in order to utilise you exiting PVDM2-48 you will require additional 32 voice-channels, the PVDM combinations are broken down as follows. I believe 2851 support 3 PVDMS:-
one PVDM2-64 + one PVDM2-8
two PVDM2-32 + one PVDM2-8
one PVDM2-16 + one PVDM2-48 + one PVDM2-8.
If you have on a single PRI trunk then a PVDM2-48 would be sufficient for a single E1 and 12 FXO ports. This is not including any harward transcoding/conferencing, if you require such resource then you will definately require additional PVDMs.
Hope this helps
Regards
Allan.
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