I´m having a Callmanager 4.1(3)SR1 with a Cisco 2811 Gateway connected via MGCP (IOS 124-2.T1)
The problem is that sometimes on outbound calls to PSTN have a delayed setup of the voice path. Meaning that the call is already connected but the callers couldn´t hear each other for the first few seconds. It seems to be similar to the problem in H.323 that could be resolved with "h323 faststart".
There are no settings similar to H323 faststart to cut the audio through quicker. Delayed audio with MGCP is typically going to be issues with delays or lost packets in the network. You can look in the Detaled CCM Trace from the server that the MGCP GW is registered to and see if the packets are lost. You will be able to follow the MGCP signaling. If you see something like the below message then the CCM did not see a response from the GW and retransmitted the packet.
MGCPHandler TransId: 328815 Timeout.
You can look at the time stamp of this event and look backwards in the trace for the original signal (look for 328815). I believe by default the timer is set to 3 seconds. So you would have to go back 3 seconds in the trace.
You can adjust the service parameter of "MGCP Timer" to 1 or 2 seconds to decrease the delay in retransmitting the packets if this is the issue. But you probably should look into what is happening on the network.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
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 ...
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