In CUCM 9.1, I noticed that there is no dial tone on FXS port on VG224 when prefix DN is configured in CUCM.If we remove the prefix DN, then we can make calls. This seems to be new because this is working in CUCM 6.1 and 7.1.Any parameter to change o...

                Some Cisco phone are sending a DHCP release when renewing the DHCP lease.In some cases the phone reboots with a new IP. The DHCP server is a Cisco switch.Any reason of sending a DHCP release when renewing the lease? Some phones are se...

Hello,I have a Bogen TPU100B paging system that requieres a contact closure to trigger the night ringer.I have a 2921 gateway and EM and FXO card. Is there a way I  can make a contact closure with those interface?Thanks

We are using CME as SRST for our remote site How does CME get the phone configuration from Call Manager. If I change a dn on Call manager, the old DN is still present on the phone in SRST. Seems that CME keeps the old configuration of the phone ans i...

We have few HP laserjet 4345 MFP connected to ATA. We are able to send faxes but when we receives faxes, the fax does not seems to detect the ring provided by the ATA. We are able to ring a phone.