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Community Member

how to connect two PBX isdn D channels through routers transparently?

PBXa-------routerA---------------WAN---------------------routerB---------PBXb

e1 e1

pbxa and pbxb want to exchanges D channel information

transparent ccs?but the WAN leased line is DDN

3 REPLIES

Re: how to connect two PBX isdn D channels through routers trans

if your pbxs are capable of using qsig then use qsig between the pbx and router at each end, then setup dial peers and it should all work.

if the pbx cannot use qsig but can use dpnss then you can use a dpnss/qsig convertor (we use the iiq2000 from westell) these can be setup in transparent mode and forward all dpnss functionality. again setup dial peers on your router

hope this helps

Community Member

Re: how to connect two PBX isdn D channels through routers trans

PArt of what you want to do is nail up the d-channel signalling between the two PBX's. Then the key is that the PBX's need to be the same manufacturer for this to work. Different manufacturers, then Q.SIG is where you need to go and your capabilities will be deminished.

Silver

Re: how to connect two PBX isdn D channels through routers trans

If all you want to do is pass the D channel information without needing to switch the audio , you can use a channelised E1 and configure timeslot 16 for STUN encapsulation. The D channel is tunnelled in the STUN, which then uses TCP/IP to route to the destination. The D channel signalling frames will be sent across the network and will pop out in TS 16 at the far side.

If you need to pass voice traffic as well, you will need to configure connection trunk on each timeslot to nail down each DS) to a corresponding timeslot at the remote site.

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