sundance-communications.com/forum Forums TDM Business Telephone Systems Toshiba Telephones & Systems IP Telephone Setup

Ahh!! Turning off DiffServ solved the problem! That's....great! And....terrible!

I need to have diffserv running as my ISP, with whom I have a MPLS network to all my offices, is set to use to prioritize my voice traffic...

And, why does it fail here, but works on the other two phones I have out?

And, shouldn't the VPN encapsulate this traffic? That makes me think it's the router....hmmmm.....

Any help / advice would be greatly appreciated. I'll have the phone and router back tomorrow in my office so I can do some more testing in better controlled circumstances.

The latesst firmware for LIPU is 51D as of 8/18/06

Hi All,

I've been reading this thread and am just not sure if I can do this. We have a Toshiba IP phone system and we want to expose a public address for remote telephones to "call" to connect to our internal system. I created protocols on our ISA 2004 firewall, similar to those above, but the phones state that they cannot find the IPU. Is it possible, using an ISA 2004 firewall, to allow telephones outside the network to connect to the LIPU?

I'm so confused... :confused:

Thanks,

Mark

The phone system can't be behind NAT - and as far as I know, that means PAT as well. If the ISA is ROUTING traffic, it should be able to work. External outside, goes through ISA, ISA sends traffic through to the secure side and the secure side has public IP addressing. This could be a DMZ area.

But don't NAT / PAT. Don't change it from <external address> to a 10.x.x.x or 192.168.y.y or 172.16.z.z.

Thank you PMC. I will continue to try and get this to work.

Thanks,

Mark