Multi-site SCN

[bobbdeep]

I have a Multi-Site SCN: Site A, B, C, D, E. Site A is the host and has the centralized VM PRO. Site B, C, D, and E can communicate with Site A with out any issues. Site B, C, D, E can call each other, but there is no Audio.
i.e. Call from B to C rings at C and the phone displays the correct directory name, but callers can not hear each other.

All IP Lines are configured as follows:

g.729a 8K ACELP
Local DTMF tones enabled
Allows Direct Media Path enabled
Voice Networking enabled

Whats that small silly thing that I am missing??

 

[PCGtech]

Well,

I had the same problem then I switched us to G711 ULAW 64K and added faststart Enanbled. between the 2 items my issues went away.

Goodluck

Jim

 

[dontworx]

Are you running a VPN,or MPLS, are you using nat and sitting behind a router or firewall or both? Usually not always, one way audio is do to NAT not being able to dig deep enuff into the packet to return the audio on the correct ports.

 

[spridge]

Had a similar problem recently

Turned out to be a problem with the routing of IP packets

You don't say how your sites are connected together

I prefer to use static routes in the IP Office configs

You need to have entries in each unit for the routes to all of the other units

 

[bobbdeep]

The Sites are connected over VPN with Sonicwall PRO Series Firewalls and just to clarify its not one way voice, there is no voice or audio on either side.

Does the VPN need to be a Mesh configuration? I thought it would only need to be a star since the main site is the "gateway" for the others?

 

[IPGuru]

Check the firewall is allowig h323 vooice packets

H323 call setup is on ports 1719 & 1730, voice data can be on any port in the range 41952-53247

 

[bobbdeep]

Its over VPN so there are no closed or blocked ports. As I stated before the communications are fine between the remote sites and the host site.

I will check to be sure there are IP routes built to / from every site but that means there must be a VPN tunnels to and from every site.

 

[CarGoSki]

It sounds like you have incomplete routing or inproper addressing on the data T1s. You should evaluate your network diagram for inconsistencies and of course make sure that your IP routes are entered into the IPO.

 

[NuggiFirst]

If you're using "Allow direct media path", you should have tunnels between all sites.
If your VPN-setup is a star-setup, you need to remove "Allow Direct media path".

On Sonicwall you also need to remove any "H323 helper" functionality! Otherwise you'll end up with one way speech/no voice problems. We have two sites with Sonicwall VPN, both have had problems because of the "H323 helper" in the Sonicwalls...

 

[dphoneguy24]

I had an experience similar to this also with SonicWall VPN equipment. First, make sure that at one of the remote sites you can ping an address at another remote site. We found the problem with the setup in the SonicWall devices that had to have the routes added. Everything worked fine from a remote to the central site and vice versa but not from a remote to a remote. You still want the STAR configuration in the IPOs if you have SCN ticked on.

Dphoneguy24

 

[bobbdeep]

I'll check the configs on the Sonicwalls and VPN to be sure we are passing traffic between sites. Thanks to all