One way speech

[SCs5thGen]

I have a BCM 50 r3 (3.0?) calling to a BCM 400 4.0. via VOIP using SIP. The sites are VPN'd using Cisco routers. When calling fron the 50 to the 400 ext to ext is fine, but when calling to the attendant first then tranfered to the ext desired is when one way speech occurs. The originating caller can hear. The person being called cannot. Using all IP phones (I-2004)

 

[cook1082]

You'll need the following ports open:
7000
28000-28511
51000-51063
and you may need 5989

Trunk ports
H323
1718/1719/1720

Sip
5060

Table 56 Firewall configuration
Port Type Description
5989 TCP Required for running Business Element Manager
across a firewall
25 TCP SMTP used for Unified Messaging
143 TCP IMAP used for Unified Messaging
161 UDP SNMP management
162 UDP SNMP traps
389 TCP LDAP used for Unified Messaging
1222 TCP LAN CTE client traffic
1718 TCP H.323 signaling traffic
1719 TCP H.323 signaling traffic
1720 TCP H.323 signaling traffic
5000 UDP QoS monitor probe packets
5060 UDP SIP traffic
7000 UDP Unistim IP set signaling traffic
20000-20255 UDP Voice Path for IP telephony which is used when
28000 range is unavailable
28000-28255 UDP Voice Path for IP trunks

 

[SCs5thGen]

Thank you Cook for all the info.
But does it make since that it will work calling directly voip but not when transfered voip???

 

[cook1082]

When you call IP set to IP set the BCM sets up the call but after that the BCM is out of the equasion and the sets are talkinfg to each other when the AA transfers the call it is the BCM and an IP set together not sure where your problem is.

 

[hawks]

Is the attendant a live person? Does the same thing happen going from 400 to 50?

 

[oldestgeek]

Check the mask and default gateway on both BCMs and all telephones used in the testing. Also check that the codecs match on both trunks and IP sets.

 

[SCs5thGen]

Update...
Suddenly, calls using VIOP (SIP) same as original post and also direct call without the transfer had no speech path. Changed all codecs to G729 on both BCMs and stations, rebooted BCM 50 and still no speech path, he even lost speech on external calls coming in. Changed back to G711 on stations (of the BCM 50) and calls come through. But when calling to one ext then getting transfered to another, one way speech path. He could hear me but i couldn't hear him. I told him to put me on hold then pichup the call again. VIOLA, we were talking. That doesn't fix the problem only confuses me more. My guess is it has to do with SIP between the 2 different versions of BCMs???

 

[oldestgeek]

I suspect that putting you on hold and picking it back up created a conference with the BCM so that the talk path was through it rather than peer to peer. One thing to try is assigning the IP addresses of the phones to two PCs (make sure they're on the same VLAN as the phones), disconnect the phones, and see if the two computers can ping each other. If not, you have a routing problem, if they can, you have a port or ports blocked somewhere. To test that use a utility such as Nmap-Zenmap GUI to test all the TCP and UDP ports between the two default gateways.