I am trying to configure my SRST router to play MoH to the IP Phones of that site, without success for the time being.
The IPmc layer is working properly, since I saw the LAN switch (between the SRST router and the phones) building the IPmc tree from the SRST LAN to the IP Phone destination LAN when the phone is put on hold.
Moreover, I also verified that these IP Phones on the site of the SRST router are playing the music just fine if it comes from CUCM itself via multicast across the WAN. So the MRG, MRGL, AudioSource, MoH server seem to be correctly configured on the CUCM side.
I need your help to start debugging the problem, and in this context I have some basic questions:
1. ¿How does the router know the TTL of MoH packets? ¿Does it inherit this information from CUCM? I have not seen any IOS command that tells it how to configure the TTL parameter. Unfortunatelly, I am not able to deploy a sniffer on the remote side to see the TTL of the packets coming out of the SRST router.
2. The following is the output of a couple of show commands in the SRST router:
VG01New# show ephone summary
Active MOH clients 0 (max 830), Media Clients 0, B-ACD Clients 0
File SampleAudioSource.wav type WAVE Media_Payload_G711Ulaw64k 160 bytes
Moh multicast on 188.8.131.52 port 16384 via 184.108.40.206 via 220.127.116.11
VG01New#show ccm-manager music-
Current active multicast sessions : 1
Multicast RTP port Packets Call Codec Incoming
Address number in/out id Interface
18.104.22.168 16388 0/0 13399 g729r8 Lo0
¿Is this normal output?
3. After reading the configuration guide, I am not sure whether the MoH Server must be in a G.711 region. ¿Is this really a requirement? I am asking this because I found that the CUCM administrator has already configured the MoH Server in a G.722 region.
Any help will be greatly appreciated.
Best regards, Rogelio