sundance-communications.com/forum Forums Other TDM Phone Systems Telrad Telephones & Systems Two Gateways on an IP Network

Hi all,
This is my first post and Iappreciate any help I can get. I am installing a 3 site networked Telrad. The sites are connected by a ATT MPLS backbone and we are putting sip trunks accross them, this part is up and working good. As the MPLS is a completely private VPN, we have a second ATT router with a T1 of Internet on it and that is also connected to the network. Here is the problem. I have 2 gateways...1 is for the MPLS router and runs my sip trunks, the second is for the Internet and it runs my remote IP phones (India, England, etc...) Where would I, or do I need to, program up the second gateway for the remote IP phones? Do I need a second TVSE server? Again, I appreciate any help.

Jeff

I don't know the specifics of Telrad, but in general, you need to make 3 entries in its routing table. Make one entry for each remote site, directing traffic to the ATT MPLS router. Then your ATT T1 router can be entered as the default gateway.

The route command can be spelled various ways. Try typing "route ?" at your command line or ? or /? or -? . This may show you a list of commands. You can also read the lovely manual.

Are you using 3015 IP phones in the remote locations (England and India)? Or do you have 3 Telrad Systems and trying to network then through SIP trunks on the TVSE Card (TVSE to TVSE ip Networking)? Or 2 Telrad Systems with TVSE Sip trunks networking and 3015 Ip Phones in the 3rd location? Are you using BOSE SIP Gatways?

Tony,

I have two networked systems in the states. They are using Sip trunks on the AT&T MPLS backbone. On the main site, I also have an internet T1 and will be using that to provide connectivity to the remote 3015 IP phones that are going to be in India and England. I am wondering how you program the TVSE and the Ipex for gateways when technically there are two, one is 192.168.1.254 for the SIP trunks and the other is 192.168.1.1 for the Internet to the 3015 IP Phones.

Thanks,
Jeff

As I mentioned above, you must make one router your default gateway and then enter routing table information for traffic that should go to the other router.

Do you know the public IP addresses of the other two phone switches? You will need that information. Then you enter a route command that says "For SWITCH-2’s-IP-ADDRESS, use 192.168.1.254". You do this again for the third switch.

All other traffic will then go to your default gateway, e.g. 192.168.1.1, and from there will go to Cheddar or Calcutta or wherever.

Do you have the Telrad manual in a PDF you could send me? I could take a quick look for the exact form of the command. This could even be done remotely.

I here ya, So you want the trafic for the sip trunks to goto one router (TVSE to TVSE) and the IP phone tracfic to go over another router and use only one TVSE card in this location. I never did this but I think you can do it in System Parameters, Ip Parameteters, Gateway Parameters in the E-Manger. Let me know how it works out. I'll try it in my office tommorrow if I have time.

After sleeping on this. I'm not sure if that would work because it looks like you can only have one defalut gateway on the TVSE card. I think you would have to go with a second TVSE card. The above posted it is if you have multiple TVSE cards that you need to connected too on the far ends. But you can try it. Good Luck.

Yes you can only have one default gateway in use at a time. However that does not mean you can only have one gateway. You can have many gateways on each local area network. A gateway is just a way out of your local area network. There can be several. Which gateway will be used depends on your destination IP address and your routing table.

Although you can only have one default gateway in use at a time, you may be able to enter several default gateways in your source machine's configuration. Don't be misled by this. The second default gateway will only be used if the first default gateway is down.

I also have a concern that adding another TVSE interface card may not solve your problem. You can only have one routing table and one default gateway per machine, not per interface. Even if you add another interface, you are still going to have to configure the machine to tell it which calls to send to each gateway. But don’t take my word for it. Buy another TVSE card and see for yourself. When you change the default gateway on one card, it will change on the other card too.

Michael,

I appreciate your input and understand that there can be multiple gateways and routing depends on what is programmed in the routers etc. However, on the Telrad, the TVSE card is actually a complete PC. Each TVSE can be setup differently as it has its own network interface and Vocoder ethernet connections. I would think that Tony may be right in that if I have two separate networks I have to talk with, I may need to use two TVSE servers to do it with. I will hopefully be getting a response from Telrad technical support soon. If they hadn't setup the MPLS as a completely closed vpn then I wouldn't have had any problems. I would think Telrad would make it possible to be able to connect to many different networks even if you had to buy additional TVSE servers.

Jeff

Please let me know how it worked out. This is something that will come in the future. I would like to have an answer. Good posted.