05-07-2010 06:42 AM - edited 03-15-2019 10:39 PM
All,
Is there any possibility that losing network connectivity to call manager will bring down ISDN D channel on voice gateway or it is totally non related? I am running MGCP between voice gateway and CCM.
Thanks
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05-07-2010 06:50 AM
Absolutely. With MGCP, the ISDN Q.931 is backhauled to the CUCM. This means that CUCM controls the D+B channels. If CUCM is dropped (fault in host, network, etc.) then your Q.931 protocol exchange ceases and your D-channel (and B-channels) are dropped.
HTH.
Regards,
Bill
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05-07-2010 06:50 AM
Absolutely. With MGCP, the ISDN Q.931 is backhauled to the CUCM. This means that CUCM controls the D+B channels. If CUCM is dropped (fault in host, network, etc.) then your Q.931 protocol exchange ceases and your D-channel (and B-channels) are dropped.
HTH.
Regards,
Bill
Please remember to rate helpful posts.
Please remember to rate helpful responses and identify
05-07-2010 07:05 AM
Most definitley. MGCP is backhauled to CUCM so connctivity issues
would result in losing the primary D Channel and the B channels. In
some instances a carrier flap may only show a D channel down but if
you know you lost connection then that would be the primary issue.
Sent from my iPhone
On May 7, 2010, at 9:43 AM, yuhuiyao
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