The explanation for your syslog message is " The B-channel indicated by this alarm has gone out of service. Some of the more common reasons for a B-channel to go out of service include: Taking the channel out of service intentionally to perform maintenance on either the near- or far-end; MGCP gateway returns an error code 501 or 510 for a MGCP command sent from Cisco Unified Communications Manager (Unified CM); MGCP gateway doesn't respond to an MGCP command sent by Unified CM three times; a speed and duplex mismatch exists on the Ethernet port between Unified CM and the MGCP gateway"
Check the Unified CM advanced service parameter, Change B-channel Maintenance Status to determine if the B-channel has been taken out of service intentionally; Check the Q.931 trace for PRI SERVICE message to determine whether a PSTN provider has taken the B-channel out of service; Reset the MGCP gateway; Check the speed and duplex settings on the Ethernet port.
We are upgrading our UCM cluster from 10.5 to 12.5 what is the preferred method of license manager (Cisco Smart Software Manager) considering the security risksDirect could accessDirect cloud access through and HTTPs proxy -Mediated access through a...
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MPP 6800 series - DECT Deployment Guide
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Contributed by Christian Nuche (cnuche), Cisco DSM Designated Services Manager - Hig...
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