I'm currently in Singapore, using Cisco 2900 Series Router with HWIC-1B-U BRI ISDN Card, which is a built-in NT1 card. After configuration, when I do show isdn status command, it shows that the Layer 1 status is deactivated.
I try a few troubleshooting,
1) I use this HWIC-1B-U on another ISDN line, Layer 1 status is shown activated. This shows that the card has no problem.
2) I switch the card to WIC-1B-S/T-V3, with a external NT1 box, the Layer 1 status is shown activated. This shows that the ISDN line has no problem.
I have already do a no shutdown and clear interface commands on the BRI Card. However, no matter what I do, I cannot get the HWIC-1B-U card to work with a few ISDN lines.
Is there any other command or setting I need to do before I get it working?
Or what could be the problem?
Thank you if anyone can help.
