Once again a teleworker no audio question 1

[veenstrahiem]

I have installed a new DSL-modem/router (Draytek Vigor 2820) after our old DSL-modem (Speedtouch 780) was giving problems.
I have created open ports the same way as in the old modem, the teleworker phone can connect and dial numbers, but there is no audio both-ways.
The Telework-network-analyser (TNA v3.0) gives an all-ok on all channels, including UDP 20000-23000.

Does anyone have an idea about this?

 

[TheMitelGuy]

Replace the DrayTek. Its a piece of junk.

 

[Mitelmatt]

sorry, just to confirm this router is at the remote site yes? or is this in the head end?

 

[veenstrahiem]

@TheMitelGuy : up to now I wouldnt agree with you, this router has been recommended to me by several collegues.

@mitelmatt: This router is at our head-office, with the teleworker-server behind it in a server-only config.

look at the picture and tell me what is wrong.
Even the TNA-tool gives an OK for the voice-traffic (UDP 20000-23000)
I erased the WAN-ip adress for security.

 

[Mitelmatt]

Sounds like a problem with getting UDP from the and to the lan.

I would either:

See if there's something blocking outgoing ports. The only ports i see not in your doc are UDP on 1024 - 65,535, but they need to go from the server to the LAN and from the server to the Internet. It's this or the other UDP 20000 - 23000 that causes what you are saying.

Have you given the server an internal address yeah? 10.0.0.8?

the way the teleworker works is that the internal phones need to communicate with the EXTERNAL address also, so can you nat outside and inside on the router?

In the local networks in the teleworker server , have you all the networks (subnets) that the phones are on?

Failing all that i would put look at putting it in server gateway mode

 

[slapin]

Is it possible to switch DSL modem to a bridge mode and get Cisco router behind it? 800 series worked perfectly fine and it is easy to control and troubleshoot if needed.

 

[veenstrahiem]

Thanks Mitelmatt, your comments made me look at it from another point of view. After checking out long syslog-files, I figured it out, wrong NAT translations. We have several public ip-adressen on this ADSL-modem, and the call came in form the internet on 1 adres, but tried getting back through another ip-adres. This didnt work. I changed the open-ports setting to the other wan-ip-adres, and now it works.

@themitelguy: I must say you are partially right, this modem isnt handling multiple wan-ipadresses the right way.

thanks again, this thread can be closed