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From: tronix@polari.UUCP (David Daniel)
Newsgroups: comp.unix.questions
Subject: Re: need help with leased lines
Message-ID: <3550@polari.UUCP>
Date: 20 Mar 91 00:40:23 GMT
References: <10763@sales.GBA.NYU.EDU>
Reply-To: tronix@polari.UUCP (David Daniel)
Distribution: na
Organization: Seattle Online Public Unix (206) 328-4944
Lines: 37


You want to make sure of a couple of things (at least) regarding the modems:

1. Make sure they're both set for Leased Line operation (register S27).

2. If you're using cu then you'd want the calling modem set appropriately.
On my PB 2400 Plus S27 bit 0,1 allows these options:

0 async.

1 sync. mode 1: async. control of call placement.

2 sync mode 2: stored number dial controlled by DTR.

3 sync. mode 3: manual dial thru DTR control of data/talk switch (requires
telephone handset).

bit 2 is 0 for dialup line, 1 for leased.

bit 3 is not used.

bit 4 is source for sync. transmit clock: 0 modem (EIA pin 15). 1 data terminal
(EIA pin 24).

bit 5 is reserved

bit 6 0 for CCITT 1 Bell 212A

bit 7 reserved

I think a standard leased line is supposed to be 4 wires. Either way, the 
wiring of the jacks is the crucial part.
-- 
David Daniel (The man with no disclaimer)  tronix@polari.UUCP
IN CASE OF HEADER MUNGING USE: uw-beaver!sumax!polari!tronix

     Verus amicus est tamquam alter Idem.