Dears,I have a Cisco 9971 and a polycomm hdx registered as SIP phones to my CME.Video Calls initiated from Polycom to 9971 works susccessfully and i can see from the polycom side that it is transmitting h264 and receiving h264.but video calls initiat...

Dears,i need to know how to upgrade the licens on the 3750E cores switches.i got the license file, but i need the procedure to do the upgrade on the router.

Dears, I'm configuring a NonGwtekeeper Controlled trunk between CUCM 7 and CUCM 4.3 Calls from 4.3 to 7 are successful, but the reverse way is not working, Kindly advice about that.

Dears,I'm configuring a NonGwtekeeper Controlled trunk between CUCM 7 and CUCM 4.3Calls from 4.3 to 7 are successful, but the reverse way is not working,Kindly advice about that.

Dear all,i have established a successfull Hub&Spoke DMVPN connection between routers, but i'm not using a pre-shared key, i'm using a certificates that i could enroll from a CA server where i installed mscep.My configuration worked when i had put"rev...