Solved: Cisco 3845 with NM-HDV2-1T1/E1

Sriharshaa Prabhakar · ‎10-07-2007

Hi Team,

We have received a Cisco3845 that has the below configuration:-

HWIC Slot 0 VIC2-4FXO

HWIC Slot 1 VIC2-4FXO

HWIC Slot 2 VIC2-4FXO

HWIC Slot 3 VIC2-4FXO

NM Slot 1 NM-HDV2-1T1/E1 One Onboard E1

There is only one PVDM2-64 on board the Cisco 3845 MB and there are no DSPs on the NM-HDV2-1T1/E1.

Is there any way that I can use the onboard DSP (PVDM2-64) and allocate 30 Channels for the NM-HDV2-1T1/E1.

When I try to configure the pri-group timeslots 1-31 on the E1 Controller 1/0 I get a message that there are No DSP Resouces to create the Voice Port.

I believe NM-HDV2-1T1/E1 should have its own DSP Resources, but would like to clarify from the experts here on the forum.

Regards,

Sriharshaa Prabhakar

Senior Network Engineer

Network Services Division

Emirates Computers

P.O.Box 7222, Abu Dhabi, U.A.E.

Phone: +971 2 673 2500

Mobile: +971 50 521 29 56

E-mail: sriharshaa.p@ecead.ae

Web: www.emiratescomputers.ae

paolo bevilacqua · ‎10-07-2007

Yes, it needs it's own resources, and cannot use the DSP on the board. Perhaps you can trade the pvdm2-64 for 2 x pvdm2-32, that's what you would need if using 'light' codecs only.

hope this helps, please rate post if it does!

View solution in original post

pcameron · ‎10-08-2007

Do the following -

voice card 0

dspfarm <--- add this command

voice card

dspfarm <--- add this command

These will enable DSP resource sharing between the motherboard DSP's and the voice card in the NM slot.

You then need to enable correct clocking synchronisation between the NM-HDV2 and the router TDM backplane by adding these commands -

network-clock-participate slot

network-clock-select 1 e1

View solution in original post

paolo bevilacqua · ‎10-07-2007

Yes, it needs it's own resources, and cannot use the DSP on the board. Perhaps you can trade the pvdm2-64 for 2 x pvdm2-32, that's what you would need if using 'light' codecs only.

hope this helps, please rate post if it does!

Sriharshaa Prabhakar · ‎10-07-2007

Hi Paolo,

Thanks a lot buddy, I have rated the post...

Regards,

Sriharshaa Prabhakar

Senior Network Engineer

Network Services Division

Emirates Computers

P.O.Box 7222, Abu Dhabi, U.A.E.

Phone: +971 2 673 2500

Mobile: +971 50 521 29 56

E-mail: sriharshaa.p@ecead.ae

Web: www.emiratescomputers.ae

pcameron · ‎10-08-2007

Do the following -

voice card 0

dspfarm <--- add this command

voice card

dspfarm <--- add this command

These will enable DSP resource sharing between the motherboard DSP's and the voice card in the NM slot.

You then need to enable correct clocking synchronisation between the NM-HDV2 and the router TDM backplane by adding these commands -

network-clock-participate slot

network-clock-select 1 e1

Sriharshaa Prabhakar · ‎10-08-2007

Hi Cameron,

Thanks, this has helped me to resolve the issue,

Regards,

Sriharshaa Prabhakar

paolo bevilacqua · ‎10-08-2007

I didn't know DSP farm was possible for this configuration; the fact that you are confirming it works it's even better.

I apologize for the confusion I made indicating the opposite.

Sriharshaa Prabhakar · ‎10-08-2007

Hi Paolo,

No problem man, I am happy that we learnt something new from Cameron.

Regards,

Sriharshaa Prabhakar