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Community Member

- D-Channel Blocked -

My ISP says the router is 'blocking out the D Channel'

I am using an MGCP gateway backhauling the ISDN to Call Manager - I am seeing 'path code violations'

yet when the telco puts a loop in the line, it tests clear.

They insist is it the CSU (customer service unit - ie the router!)

I am really stumped here... any ideas ??

Bascially I have 'Layer 1 - Deactivated / Shutdown' with multiple path code violations

1 ACCEPTED SOLUTION

Accepted Solutions
Community Member

Re: - D-Channel Blocked -

This is a definately a Telco related problem.

However to rule out any options from your side you can try configuring it with H323

because D channel is backhauled with call manager in case of MGCP to verify that it is not a call manager issue

you try that with h323 and also make sure we are on the latest IOS on the gateway.

HTH

Vivek

3 REPLIES
Community Member

Re: - D-Channel Blocked -

This is a definately a Telco related problem.

However to rule out any options from your side you can try configuring it with H323

because D channel is backhauled with call manager in case of MGCP to verify that it is not a call manager issue

you try that with h323 and also make sure we are on the latest IOS on the gateway.

HTH

Vivek

Community Member

Re: - D-Channel Blocked -

I help test H323 - I ACL blocked all communication to Call Manager - triggering SRST -  and the fault was still there

The Telco eventually admitted the problem yesterday.

Thanks for your help

Hall of Fame Super Gold

Re: - D-Channel Blocked -

Please send "show controllers T1"

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