I have an issue with some call transfer from PSTN. Ex: A cellular user transfers his cell. phone on busy or no answer to his business ip phone. When the transfer is done, we have no ring back tone. I am running ip plus 12.2(4)T1 on 3640 using T1-CAS and CallManager 3.2(1.1). We had same problem with 3.1(2c). The problem is not with all cell phone but only with specific cell. phone carrier.
Cell phone switch ---- PSTN ----IOS Gateway ---- CallManager ----- Business IP phone ---- if no answer ---- Unity
Which debug command can help me out or command to resolve that problem?
I am not sure exactly what you problem is. The person calling the cell phone is forward no answer and busy to his ip phone. Then the call goes to unity. When are they not hearing ring back. When the call is to the cell phone or does the ringing only stop when the cell phone forwards the call to the ip phone. If the user call the phoned directly do they get ringback? I guess you could do a debug vtsp all. The ringback should be coming from the dsp in the router.
Let say the cell phone forward all calls to his business phone (ip phone). The problem is when a person call that cell phone then the person got transfer to the ip phone ... we can hear the ip phone ringing but the person calling does not have ringing ... if we answer we can have a normal conversation ... if you do not answer that call then we got connect to Unity and we can hear the greating from Unity and leave a message.
So when the if the users call the phone directly without getting forwarded do they hear ringback? What does the ccm trace look like? Do you ccm send alerting in h.323 to the gateway? Did debug vstp all or debug vtsp dsp show you anything. Like I said before the DSP in the gatewayt should be playing the ringback.
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The short answer is that you don't.... That isn't entirely true while at
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Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...