CMP.WERNER@UTEXAS-20.ARPA (10/17/83)
From: Werner Uhrig <CMP.WERNER@UTEXAS-20.ARPA>
I just acquired a modem, INTERTEL MCS1200 very cheaply, which I am trying to
get to work and would appreciate some help with.
Is there someone out there who either has one, has access to a manual for it,
or can give advice with the followig problem.
Note: I only have a 2 page copy of specs and description, and am rather
ignorant with hardware.
Description: sync or async modem, operating at 1200 or 1800 Baud.
DataRate: sync at 1200 on unconditioned Type 3002 lines and 1800
on C2 conditioned Type 3002 lines.
async operation up to 1200 bps on uncond. 3002 and 1800 ...
Data Format: serial sync or async (strap selected)
Op. Mode: half or full duplex, 4wire lines
Carrier: switched or constant
Modulation: FSK
Clear-to-Send-Delay: 0 85 + 5ms or 60 + 5ms (strap selected)
Transmit Level: 0dBm to -12dBm adjustable by calib. potentiometer
Receive Level: +5dBm to -35dBm
etc.....
These are the setup and problem symptoms:
- I hook red and green phone cables to one pair of line connectors
and connect it to the second pair with a jumper-wire
- I connect via RS-232 cable to my H/Z-100
- the indicator lites test ok
- the switch to have the modem "self-test" is "frozen" and can't be
moved to cause a self-test.
- the indicator lights come on ok, but when I would expect to see
the RTS and CTS lights indicate a "conversation", nothing happens.
the lites on are: PWR, DCD, RXD.
- the jumpers look "right" as far as I can tell without manual,
but the modem must have gotten wet as all are corroded (that's
why I got it cheap in the first place)
Anyone with advice out there ?
Werner (UUCP: {ihnp4,ut-sally,decvax!allegra,ucbvax!nbires} !ut-ngp!werner
or: { ut-sally , ut-ngp } !utastro!werner
ARPA: werner@utexas-20
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