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Cisco 837 VPI limit?

I have searched high and low for a solution to this problem but it seems nobody else ran into it.

I recently purchased on the cheap a new CISCO837 router and I am trying to make it work with my provider.

The problem is my provider PVC (VPI/VCI) parameters are 100/100 and this router will NOT accept anything higher than 31

for the first part. It will accept 31/100 but not 32/100. I even upgraded the software but no luck!

When I do #sh dsl int atm0 all dsl parameters (line speed, nise margin, attenuation) seem to be normal except there is no traffic

I have a couple of CISCO2610XM routers with ancient ADSL WICs in them and they work fine with above parameters.

Does anyone have a solution to this?

Is the limit hardwired in the ios or the firmware?

Should I start using this router as a doorstop?

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