- D-Channel Blocked -

Answered Question
Dec 22nd, 2009
User Badges:

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

Correct Answer by vivkalra about 7 years 7 months ago

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

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
Loading.
Correct Answer
vivkalra Sat, 12/26/2009 - 12:44
User Badges:

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

keanej Wed, 12/30/2009 - 01:22
User Badges:

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

paolo bevilacqua Sat, 12/26/2009 - 17:36
User Badges:
  • Super Gold, 25000 points or more
  • Hall of Fame,

    Founding Member

Please send "show controllers T1"

Actions

This Discussion