Ericsson MD110 cisco 2811 and isdn BRI

alessandro.dona · ‎02-05-2009

Hi to all,

i have an ERISCSSON MD110 PBX connecte via an isdn BRI interface to a cisco 2811.I can see the bri interface up,up ma i can't see q921 signaling passing through the interface and i can't place calls.

PBX has QSIG GFP(the PBX manager told me) signaling type and i configured basic-qsig under BRI.

any idea?

thx....

paolo bevilacqua · ‎02-05-2009

Are you made the crossed cable and config as per:

http://www.cisco.com/en/US/tech/tk652/tk653/technologies_configuration_example09186a008010ef6c.shtml

alessandro.dona · ‎02-05-2009

No i'm using a crossover(3-->4,4-->3,5-->6,6-->5) i tried yestarday also with the combination shown in your link but it did not work.maybe some problem with qsig GFP

paolo bevilacqua · ‎02-05-2009

No it must be done as per link, configure properly and it will work.

alessandro.dona · ‎02-05-2009

can you explai better?

paolo bevilacqua · ‎02-05-2009

Alessandro, what should I explain, it's all in the document. Currently you have the wrong cable and not posted your config.

alessandro.dona · ‎02-05-2009

interface BRI0/3/1

no ip address

isdn switch-type basic-qsig

isdn overlap-receiving T302 3000

isdn protocol-emulate network

isdn layer1-emulate network

isdn incoming-voice voice

isdn T310 120000

isdn static-tei 0

isdn skipsend-idverify

isdn layer1-emulate network

and also i find this combination(see attached.

paolo bevilacqua · ‎02-05-2009

Seems fine, you don't need

isdn T310 120000

The diagram you posted is pin numbers and functions, not the cross-over cable wiring.