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New Member

MOH through PSTN access

Hello,

I need some help about MOH.

I have a callManager v9 and a remote site with a H323 GW (version 152-4.M5). The WAN link is very poor and I need to put the moh on the Gateway.

Between 2 ip Phone (7942), the moh is correctly provided by the Gateway, but when a call pass through the BRI port, the MOH is provided by the CUCM.

I don't understand why.

This is my configuration on the CUCM:

Music On Hold (MOH) Server Configuration

Enable Multi-cast Audio Sources on this MOH Server tchecked

Base multicast address 239.1.1.1, port 16384 with increment by IP

On the H323 gateway, I place the MRGL which contain the MRG (with Use Multi-cast for MOH Audio (If at least one multi-cast MOH resource is available) tchecked )which contain my MOH Server... Do you follow me ?

So, on the gateway, I have this

voice-card 0
 dspfarm
 dsp services dspfarm
!
!
voice call send-alert
voice call carrier capacity active
voice rtp send-recv
!
voice service voip
 ip address trusted list
  ipv4 10.234.119.132
 allow-connections h323 to h323
 allow-connections h323 to sip
 allow-connections sip to h323
 allow-connections sip to sip
 fax protocol none
 h323
  no h225 timeout keepalive
  call start slow
  call preserve limit-media-detection
 modem passthrough nse codec g711ulaw
 sip
  early-offer forced
!
voice class codec 1
 codec preference 1 g711alaw
 codec preference 2 g711ulaw
 codec preference 3 g729r8
!
voice class h323 15
  h225 timeout tcp establish 5
!
voice class h323 14
  h225 timeout tcp establish 30

  telephony-service
 srst mode auto-provision all
 srst ephone description CME-as-SRST : Sep 08 2014 14:32:34 : Sep 12 2014 16:42:30
 srst dn line-mode dual
 max-ephones 150
 max-dn 180
 ip source-address 10.234.122.250 port 2000
 system message "Mode secours actif"
 load 7915-24 B015-1-0-4-2
 max-conferences 8 gain -6
 moh "flash:ZoneFR_attente5.wav"
 multicast moh 239.1.1.1 port 16384 route 10.234.123.135 10.234.122.250

 

What I'm doing wrong ? Any idea to correct my configuration will be appreciated :)

 

 

Thank you

 

Kévin

  • IP Telephony
Everyone's tags (4)
8 REPLIES
New Member

I made some tests when the

I made some tests when the ipphone place the pstn access on hold.

The result of the command show voice active call voice tell me that

RemoteMediaIPAddress=10.234.122.250

But I think I should find the multicast ip address like 239.1.1.1, no ?

Maybe the CUCM continu to provide unicast MOH instead of multicast.

Cisco Employee

can you place the call on

can you place the call on hold , and collect below

sh ccm-manager music-on-hold
sh voip rtp connections
sh ip igmp mem

 

What is this ip :10.234.122.250

Do you hear beeps or silence

New Member

Off course,GW_#sh ccm-manager

Off course,

GW_#sh ccm-manager music-on-hold
Current active multicast sessions : 0

 

GW#sh voip rtp connections
VoIP RTP Port Usage Information:
Max Ports Available: 8091, Ports Reserved: 101, Ports in Use: 3
Port range not configured, Min: 16384, Max: 32767

                                        Ports       Ports       Ports
Media-Address Range                     Available   Reserved    In-use

Default Address-Range                   8091        101         3

VoIP RTP active connections :
No. CallId     dstCallId  LocalRTP RmtRTP LocalIP                                RemoteIP
1     125863     125865     28782    28716  10.234.123.135                         10.234.122.250
2     125870     125871     28716    28782  10.234.122.250                         10.234.123.135
3     125872     125871     28524    0      10.234.122.250                         0.0.0.0
Found 3 active RTP connections

 

GW#sh ip igmp mem
Flags: A  - aggregate, T - tracked
       L  - Local, S - static, V - virtual, R - Reported through v3
       I - v3lite, U - Urd, M - SSM (S,G) channel
       1,2,3 - The version of IGMP, the group is in
Channel/Group-Flags:
       / - Filtering entry (Exclude mode (S,G), Include mode (G))
Reporter:
       <mac-or-ip-address> - last reporter if group is not explicitly tracked
       <n>/<m>      - <n> reporter in include mode, <m> reporter in exclude

 Channel/Group                  Reporter        Uptime   Exp.  Flags  Interface

 

:10.234.122.250 is the ip address of the interface gi 0/0 (voice vlan)

I hear the moh from the call-manager (but very cut sound because off the wan link quality)

 

 

Cisco Employee

ya looks like it is unicast ,

ya looks like it is unicast , check the config in CUCM 

may be increment by port 

chk this post as well

https://supportforums.cisco.com/discussion/11484616/music-hold-moh-and-multicast-cucm-85

New Member

I checked the config in CUCM,

I checked the config in CUCM, all is in multicast. I restarted the cisco voice media service, I tested with the increment by port, but always the same problem.

MOH is diffused by the CUCM.

 

New Member

I added thisip pim sparse

I added this

ip pim sparse-dense-mode

for the loopback int g0/0 interfaces, I have the same problem, but the result of this command is different :

GW#sh ip igmp mem
Flags: A  - aggregate, T - tracked
       L  - Local, S - static, V - virtual, R - Reported through v3
       I - v3lite, U - Urd, M - SSM (S,G) channel
       1,2,3 - The version of IGMP, the group is in
Channel/Group-Flags:
       / - Filtering entry (Exclude mode (S,G), Include mode (G))
Reporter:
       <mac-or-ip-address> - last reporter if group is not explicitly tracked
       <n>/<m>      - <n> reporter in include mode, <m> reporter in exclude

 Channel/Group                  Reporter        Uptime   Exp.  Flags  Interface
 *,224.0.1.40                   10.234.122.250  00:00:40 02:20 2LA    Gi0/0

And I do (from ip phone to ip phone) a

GW#sho ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
       L - Local, P - Pruned, R - RP-bit set, F - Register flag,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry, E - Extranet,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report,
       Z - Multicast Tunnel, z - MDT-data group sender,
       Y - Joined MDT-data group, y - Sending to MDT-data group,
       V - RD & Vector, v - Vector
Outgoing interface flags: H - Hardware switched, A - Assert winner
 Timers: Uptime/Expires
 Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 239.1.1.1), 00:00:00/00:02:59, RP 0.0.0.0, flags: DC
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    GigabitEthernet0/0, Forward/Sparse-Dense, 00:00:00/stopped

(*, 224.0.1.40), 00:05:02/00:02:06, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    GigabitEthernet0/0, Forward/Sparse-Dense, 00:05:02/stopped

We show that the multicast seems to be working

New Member

From this interessant

From this interessant document

http://docstore.mik.ua/univercd/cc/td/doc/product/access/ip_ph/srs/srsinter/moh.pdf

I should have this result:

"Router# show ccm-manager music-on-hold
Current active multicast sessions : 1
Multicast RTP port Packets Call Codec Incoming
Address number in/out id Interface
===================================================================
239.1.1.1 16384 326/326 42 G.711ulaw Lo0
If the PSTN caller hears MOH, but the show ccm-manager music-on-hold command displays no active multicast streams, the MOH is unicast. This can be confirmed by checking the MOH performance counters as discussed in the “Verifying Cisco CallManager Multicast MOH” section on page 16
"

It is exactly my problem, I don't have multicast stream.

So where could be my error ?

- Music On Hold Server Audio Source -> allow multicasting

- Media Resource Group -> multicast

I created a DPool and MRGL specifics for the MOH and affected to the gateway and the tested IPPhone

Ideas ?

 

Thanks

New Member

My problem was linked with

My problem was linked with the gateway configuration on the CallManager.

After a lot of debug, it appears that the call manager stream unicast when call was from PSTN access.

Answer from the TAC support :

"

Problem Description:

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

-CUCM 9.1.2.10000-28

-Call flow:

PSTN—isdn—GW---WAN----H323---CUCM

-Multicast MOH is configured to be played from the GW flash in order not to move the MOH packets over wan.

-this is working fine for internal calls, but for external calls, unicast MOH from the CUCM server is played instea.

 

Troubleshooting:

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

-Checked the configuration and they were fine.

-Noticed that the GW has “Media Termination Point Required" for specific call flow to work.

-We unchecked that, and the MOH started to work fine.

-That was due to the fact that MTP doesn’t support Multicast MOH.

-There is a bug that shows in its description that MTP doesn’t support multicast (which shows our problem) and it discusses the issue about resolving the scenario when the MTP is allocated dynamically via the CUCM:

https://tools.cisco.com/bugsearch/bug/CSCsc85921/?reffering_site=dumpcr

"

Conclusion : mtp required box unchecked and it resolved my problem

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