clpg@aluxp.UUCP (munro) (02/23/84)
[gulp]
I have a Hayes 1200 Smartmodem; my phone company is a small, independent
outfit in rural Pennsylvannia. The Smartmodem will work fine at 300 baud,
but not at 1200. It *sounds* ok (during initial sequence), but doesn't
acquire the carrier. I've had the phone company out. Here's what's been
done so far:
1) Try other Smartmodems. Try the non-functioning one from
another location. --> expected result.
2) Try a 212 dataset. --> N.G.
3) Disconnect all other phones in house. --> no different.
4) Find a neighbor with a system, see if he can run at 1200
baud. --> he has no problem.
5) Measure the 'loss' on my phone line from the office. -->
(by phone co.) 4.8db - this is 'real good'. 'Maybe its
*too good* and you have to put in an attentuator'.
6) Tried a 600 ohm pad (attenuator), with switch-variable
settings from 0 to 40 db, 2 db steps.
Tried all settings. --> n.g.
7) Measure the noise on the phone line. 'It reads 15 - 22.'
This is also 'real good.' --> ...sigh
Any hints, additional experiments, insights, etc. would be most welcome.
Dave Munro
(...whatever)!ihnp4!aluxp!clpg