Hello,   Does cisco SIP phone compatible with Avaya IPO ?  what are the steps ? and what is Cisco 7821 firmware to be installed on the phone in order to work  Thank you 

Dears,I have the below error between Informacast Paging SingleWire 11.0.5 and CUCM 11.0 when add,editing,updating or discover current ip phone infromation from cisco unified communication manager from editing recipient group(check attached)Unable to ...

Hi ALL, I have 2 Cisco call managers Publisher and Subscriber System version: 10.5.2.10000-5   Cisco jabber for windows 12.1 Cisco jabber for Iphone 12.2   Issue :Cisco jabber for windows and for Iphone not registered to Cisco call manager(no IM pres...

Hi All,   I have cisco call manager 10.5 with E1 4 digits & FXO ports , in addition to 5 branches in different locations connected to main site by sip trunk configuration ,every location or site configured with MGCP gateway and SRST to main site CM. ...