>Ok, here is what my setup will be.
>
>PM3 w/ 2PRI (t1) & 48 (6cards*8modems) truedigital modems).
>Phone number 1 (555-1111) goes into PRI1
>Phone number 2 (555-2222) goes into PRI2
Why not one phone number with a hunt group?
>
>I think I finaly understand how dialup will work from normal modems but
>what about ISDN (I guess ISDN is a generic term so the proper is BRI
>ISDN). Say there are 20 users on PRI1, leaving 3 open. A BRI Customer
>calls in to the 555-1111 number. Will he/she connect fine and take up 2
>modems? 1 modem and 2 channels (128k).
>
You have a msiconception with the way the PM3 works. First off, the modem
cards are only required for supporting analog modem dial-in. If you never
intended to service analog users, just ISDN users, just use the PM3 without
any modem cards.
However, in your example, the BRI caller would connect just fine and take up
2 DS0s of the PRI for the 128K call. No modem DSPs would be used/affected.
>What happens if there is only 1 port of the 23 open, will it combine with
>one from the 2nd PRI?
>
This is a brand new feature for Livingston. If you have the PM3 configured
for Multi-chassis multi-link PPP (MCMLPPP), you are exactly right. The last
available DS0 of the first PM3/PRI would service the first half (64K) of the
128K dial-in, and if there was an available DS0 on a second PM3/PRI, it
would service the second half of the 128K call. In MCMLPPP applications, the
PM3 that accepts the first have on the call becomes the master and any other
PM3 in the MCMLPPP network acts as a slave. The WAN side is MLPP compliant,
and on the chassis side, the PM3 uses UDP to pass connection/user
information for packet re-assembly.
--Marty
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Marty Likier Livingston Worldwide Headquarters
Product Marketing Mgr. 4464 Willow Road
(800) 458-9966 Pleasanton, CA 94588 USA
(510) 737-2164 (510) 244-1903 (FAX)
marty@livingston.com Web: www.livingston.com
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