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Connecting HWIC-4T to WIC-1T through T1 PTP

Here is my problem. I am atempting to connect my 2821 with an HWIC-4T to my 2801 with a WIC-1T via a standard T1 PTP leased line.

After a router reboot or an interface shut / no shut the link will come up momentarily and then drop. I have tested the line and all the CSU/DSU equipment in the link by temporarily using another WIC-1T in the 2821 and the link comes up and it stable.

I need to use the HWIC-4T due to needing the port density for an upcoming expansion.

Any ideas?

Thanks,

Rod Sculthorp

Network Engineer

2 REPLIES
New Member

Re: Connecting HWIC-4T to WIC-1T through T1 PTP

Sounds like a timing issue. If this is a poing to point T1 one end must provide timing. If you are using the same external CSU/DSU's this might not be a problem, but if you are not you need to make sure one end is providing timing.

The other thing to check is to make sure you have HWIC-4T and not a HWIC4-AS. The reason this matters is because the AS only goes up to 256K.

If this does not work if you could post config info it would help.

HTHT

New Member

Re: Connecting HWIC-4T to WIC-1T through T1 PTP

OK, thanks for the help. I will check out the timing issue and I know the card is the 4T since I had made the mistake with the 4AS in past.

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