Help configuring EVM-HD-8FXS/DID

[rickyhadlocon]

Hello,

Do you a sample configuration for EVM-HD-8FXS/DID? I have analog phones connected to this device but i don't hear the dial-tone.

Please help.

Thank you,

Ricky

[paolo bevilacqua]

Hi, do you have DSP modules in the router ? Please check with "show diag".

[rickyhadlocon]

Thanks for your help. Regarding your question, yes i have a PVDM2-48 currently installed in my 2851.

[paolo bevilacqua]

Ok, then unless you have all the DSPs taken for other voice ports, you should have dialtone by default.

Are you using the recommended blackbox patch panel w/ RJ21 cable ?

You can check what the FXS port does with "debug vpm signal" and "term mon".

[rickyhadlocon]

Thanks for your reply. How do i know i already exhausted all my DSP resources? I'm not using the recommended blackbox patch panel.

[paolo bevilacqua]

If the voice-ports for the module appears in configuration, there is no DSP issue.

The other possibility is that the patch panel you're using is not cabled correctly. The pinout is in the network module documentation.

[rickyhadlocon]

All the voice-ports are appearing in the configuration. We will double-check if the patch panel is cabled correctly.

Thank you.

[rickyhadlocon]

You are correct, the patch panel was not cabled correctly. Now, i can hear the dial-tone and can make calls to other analog phones connected to the same EVM-HD-8FXS/DID. However, when i dial an ip phone from the analog phone i always get a busy tone. I already configured a dial-peer voice XXX voip to route calls to the CM but i got the same result.

Am i still missing some configurations in my router?

[paolo bevilacqua]

Are you using h323 or mgcp with cm? Is this router configured as a gateway of some sort into cm ?

[rickyhadlocon]

Thanks for your reply. The router is configured as the wan router and the voice gateway at the same time. Also, the router is using H323.

[paolo bevilacqua]

Under the voip dp, configure codec g711u to begin with. Then if you need to use g729, there is chapter about that in CM's documentation.

[rickyhadlocon]

I already had that configure before. Below is my voip dp:

dial-peer voice 101 voip

preference 1

destination-pattern 9999....

progress_ind setup enable 3

voice-class codec 100

voice-class h323 1

session target ipv4:xxx.xxx.xxx.xxx

dtmf-relay h245-alphanumeric

no vad

What else am i missing?

[paolo bevilacqua]

May be the voice-class has a wrong codec preference. Use fixed g711u, that is usually the best choice.

[rickyhadlocon]

Below is my voice-class configuration:

voice class codec 100

codec preference 1 g711ulaw

codec preference 2 g729r8

codec preference 3 g729br8

Do i need to change anything from the list?

[paolo bevilacqua]

Seems ok, still I would try a fixed codec as mentioned above.

Failing that, you need to take traces either on the GW (debug cch323 - warning, can be quite verbose), or on the CCM, unfortunately on the latter I can't help.