To all VoIP gurus,
My customer currently have a CUCM 5.x that would need to be upgraded to CUCM 7.x. They have a central site with all the CUCM servers, along with 10 remote locations with SRST VGs.
Because of the WAN bandwidth limitation for the 10 x remote offices, is there any easy way where i can first upgrade all the phones on 'remote site A', then 'remote site B', then follow by 'remote site C' etc without going into each phone and change it on the phone firmware selection for each of their 1,000+ phones??
Would appreciated any help.