Handling Process
1.
Check IAD Sip Service Configuration/SIP Soft Parameter -> Authentication
type = ID
2. Change the Authentication type to Name of two IP Phones SIP
accounts
3. Verify registration status -> Successful
4. Do
incoming and outgoing test calls -> Successful
5. Change the
Authentication type to Name to all the SIP accounts configured on the
IAD
Root Cause
1.
Check SIP user settings on the CUCM -> OK!
2. Check Account settings
on the IP Phone -> User name: 7101 Register name: iad208
3. Check IAD
Sip Service Configuration/SIP Soft Parameter -> Authentication type =
ID
4. Change the Authentication type to Name
5. Retry the
registration test scenario -> Success
Suggestions
If on the SIP server, you configure the Authentication by
UserName, in the IAD this means that in the Sip Service Configuration/SIP Soft
Parameter -> Authentication type must be set to Name, not to ID. Use this
setting to avoid failed registration of the IP Phones connected to the
IAD.