[cisco-voip] One way audio with H323, works fine with MGCP

[Erick Bergquist]

Yes, the H323 interface is the Voice VLAN subinterface the IP Phones
are on. Sourced ping works fine.


On Wed, Jul 23, 2008 at 10:57 PM, Joe Cisco <smetsysocsic at gmail.com> wrote:
> You answered my first question of is the h323 bound to an interface
> that is reachable across the vpn, but it still sounds like a routing
> issue. Do an extended ping from the voice gateway pinging a live
> phone. In the extended ping, use the ip of the h323 bound address as
> the source address of the ping.
>
> If you don't know how to specify the source address in the ping,
> here's an example:
>
> ping ip
> Target IP address:206.204.18.22
> Repeat count [5]:
> Datagram size [100]:
> Timeout in seconds [2]:
> Extended commands [n]: y
> Source address or interface: 10.0.0.1
> Type of service [0]:
> Set DF bit in IP header? [no]:
> Validate reply data? [no]:
> Data pattern [0xABCD]:
> Loose, Strict, Record, Timestamp, Verbose[none]:
> Sweep range of sizes [n]:
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 206.204.18.22, timeout is 2 seconds:
> Packet sent with a source address of 10.0.0.1
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 5/7/6 ms
>
> -Joe C.
>
> On Wed, Jul 23, 2008 at 10:42 PM, Erick Bergquist <erickbee at gmail.com> wrote:
>> Have a odd issue here, that I need some ideas on...
>>
>> Have an existing working MGCP gateway (2800 series) with 3 analog
>> lines (FXO), but need inbound Caller ID so changed over to H323 and
>> receiving caller ID works fine now but getting one way audio with the
>> H.323 setup on same interfaces used for MGCP.
>>
>> The outside caller can here the person on IP Phone, but the user on IP
>> Phone side can't hear the outside caller. The IP Phone user can place
>> and receive calls in/out of the gateway fine so call setup and
>> teardown is working fine. Just seems like something with the audio
>> cutover is not working correctly.  The call flow between the gateway
>> and Call Manager is going over a VPN (Checkpoint box) and all H323
>> ports are open on the firewall I'm being told.
>>
>> The IOS version is 12.4(15)T5 on the 2800, and I am not seeing any
>> routing issues (the IP's and binded interfaces for H323 are same as
>> for the previous working MGCP setup). The audio works fine when I
>> change it back to MGCP.
>>
>> Now, only if we had caller id support for analog MGCP endpoints.
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>>
>