Procedure to allocate IP address and Port in SRST Multicast MOH :

[Payal Bhaduri]

There is a general misconception that IP addresses were allocated per audio source ID.  For example:

Audio Source	Codec	Increment Multicast on IP Address		Increment Multicast on Port Number
		Destination IP Address	Destination Port	Destination IP Address	Destination Port
1	G.711 mu-law	239.1.1.1	16384	239.1.1.1	16384
1	G.711 a-law	239.1.1.2	16384	239.1.1.1	16386
1	G.729	239.1.1.3	16384	239.1.1.1	16388
1	Wideband	239.1.1.4	16384	239.1.1.1	16390
2	G.711 mu-law	239.1.1.5	16384	239.1.1.1	16392
2	G.711 a-law	239.1.1.6	16384	239.1.1.1	16394
2	G.729	239.1.1.7	16384	239.1.1.1	16396
2	Wideband	239.1.1.8	16384	239.1.1.1	16398

However, the fact is, IP address allocated based on the order the audio source was configured.  For example, if you configure audio source 2 before audio source 1, the table would be like this:

Audio Source	Codec	Increment Multicast on IP Address		Increment Multicast on Port Number
		Destination IP Address	Destination Port	Destination IP Address	Destination Port
1	G.711 mu-law	239.1.1.5	16384	239.1.1.1	16392
1	G.711 a-law	239.1.1.6	16384	239.1.1.1	16394
1	G.729	239.1.1.7	16384	239.1.1.1	16396
1	Wideband	239.1.1.8	16384	239.1.1.1	16398
2	G.711 mu-law	239.1.1.1	16384	239.1.1.1	16384
2	G.711 a-law	239.1.1.2	16384	239.1.1.1	16386
2	G.729	239.1.1.3	16384	239.1.1.1	16388
2	Wideband	239.1.1.4	16384	239.1.1.1	16390

You may use SQL command to check this in DB:

admin:run sql select mohaudiosourceid, multicastaddress, multicastport from mohservermulticastinfo where mohaudiosourceid='4'
mohaudiosourceid multicastaddress multicastport
================ ================ =============
4                239.1.1.1        16384        
4                239.1.1.2        16384        
4                239.1.1.3        16384        
4                239.1.1.4        16384

If you wish to get a list of all MOH audio sources with multicast IP address, port, and codec you can use this query.

run sql select m.mohaudiosourceid,m.multicastaddress,m.multicastport,c.name from mohservermulticastinfo as m,typemohcodec as c where m.tkmohcodec = c.enum

mohaudiosourceid multicastaddress multicastport name    

================ ================ ============= ========

1                239.1.1.25       16384         711 ulaw

1                239.1.1.25       16386         711 alaw

1                239.1.1.25       16388         729     

1                239.1.1.25       16390         wideband

[Steven Griffin]

Excellent post!

[Tsungs102]

This really helped me clear up the misconception.  Thank you.

I was able to stream MoH from local flash after finding out audio source 1 is 239.2.1.1 in our environment.  However, this only worked for user hold but not when UCCX attempts to consulted transfer.  For some reason, during the consulted transfer the multicast address it uses is 239.2.1.5 and it is not coming from local flash and becomes garbled.

Do you know how that can be fixed?

Sam