On a Cisco 3640 Access router, what is the interface number on a line connected to the 8 th port of a module number 1?

I am not getting any clue on this question. Can anybody help me?
Thank you in advance

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Are you talking about interface numbers or line numbers? If this was an 8 port serial card (does such a thing exist?) it would be simply s 1/7 (since you'll typically count from 0).
But I imagine you're talking about line numbers. On this page:
http://www.cisco.com/warp/public/76/modem_tuning.html
you can read this:
"In Cisco 2600 and 3600 modular routers, Cisco IOS Software reserves 32 line numbers per slot. The AUX port is line 65 on the Cisco 3620 and 2600, and line 129 on the Cisco 3640.

line number = (slot * 32) + unit + 1"

So in your situation I think it ought to break down something like this (though someone will probably correct my math). I don't know if unit should be 7 or 8 (or neither), so experiment
line number = (1 * 32) + 8 + 1 = 41, or maybe 40.

I think I have a better link to this explanation at the office. If I do, I'll post it.

MadChef

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Thank you so much for your quick reply. Now, I missed something, the possible answers were like this :
a) 41
b) 64
c) 65
d) 98

Considering this, I think you are bang on target, right?

Thanks again

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