Cisco 1751V - Using same router as NT and TE

[francesco9tamburrino]

Hi guys,

I configured a Cisco 1751V, with two-VIC-2BRI NT / TE, in order to use it as a test device, IOS version "ip voice 12.4T(15)".

I have a vic configured as "network side", the other VIC I configured as a "user side": I then I connected through a cross cable isdn.

I configured the router properly (BRI interfaces, tdm clock, voice ports, dial-peer): the problem is the "power line", and both the ports used (one for each vic) are been "deactivated" (L1 State F3) when I placea call.

It 'can this setup on one router? What is meant by "phantom power"?

thanks

[acampbell]

Francesco,

For testing in a lab connecting betwwen the cards should be OK

Your NT side should use something along these lines:-

!

interface BRI0/0

no ip address

isdn switch-type basic-net3

isdn protocol-emulate network

isdn layer1-emulate network

isdn incoming-voice voice

no isdn outgoing display-ie

isdn static-tei 0

isdn skipsend-idverify

!

Your ST side should use something along these lines:-

!

interface BRI1/0

no ip address

isdn switch-type basic-net3

isdn incoming-voice voice

isdn static-tei 0

!

What do you see when you issue

show isdn status

I think if the lins are always showing as L1 deactivated then the issue is the cable.

NT SIDE                   ST SIDE

3 -------------------------- 5
4 -------------------------- 6
5 -------------------------- 3
6 -------------------------- 4

HTH

Alex

[francesco9tamburrino]

Hi,

thank you.

You've reported same configuation that i used.

I noticed that when I connect layer 1 up the doors to the CPE device carrier (found on the wall) question of ISDN NT1 Plus (This device provides power to the line).In particular, if I plug in phone isdn outside the VIC, it remains off while the same if I connect to the ISDN NT1 Plus and has warning lights.At this point I wonder how the power to impose on the outskirts? It seems that the "power line" to have no effect on the interface (do not see it then exists).thanks

[acampbell]

Francesco

Have a read at this document.

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

Seems you need to shut the interface then apply the config in a set order.

I must admit that I never had to use the line-power command for the UK.

HTH

Alex