I have a situation where I have some 8945 phones and one 8961 phone which is a sip phone , in srst I have under call-manager-fallback , the command alias 3 5249400 to 5259413 , where 5249400 is the main site number and 5249413 is the 8961 sip phone . When people dial the 413 direct it rings normally but when they dial 400 it gives them fast busy . The alias works if the number after the to is an SCCP phone . Is there a specific config in such a case ?
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Not sure if you got this working or not but...you may may need to put an alias within the voice register pool for the SIP phones.
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I'm hitting this very issue too with Cisco 2921, IOS version 15.4(3)M1.
This is a tremendous bug in my opinion.
Anyone has any info about it?
"Before the alias command is configured, translation rules must be set using the translate-outgoing (voice register pool) command. Translation rules are a general-purpose number-manipulation mechanism that perform operations such as automatically adding telephone area and prefix codes to dialed numbers."
Maybe this will be useful to other pepole out there.
I worked around this issue by having the SRST router monitor the CUCM reachability and react to a communication loss by automatically reconfiguring itself.
#ip_sla #track #EEM