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echo: aust_modem
to: Ray Mcconnell
from: Bill Grimsley
date: 1996-09-05 06:38:14
subject: Roadster 28.8K

Ray, at 14:29 on Jul 02 1996, you wrote to All...

RM> I'm having some troubles with my Roadster 28.8. It's the AM3450 model,
RM> I'm getting 26.4K connects that go 2700cps or 28.8K ones that go 3000cps, 
RM> when it used to go 3330+. I haven't changed my init string, anybody got a 
RM> consistent one that gives good speed?

It's probably your line, and there's nothing you can do about that. 
Although my Courier usually connects at 31k2 or 33k6, I sometimes have
problems with my lines early in the morning (buggered if I know why), and
get really strange assymetrical link rates, like this one...

# 05 Sep 06:26:55 BINK Connect 12000/Arq/V34/Lapm/V42Bis
[ ... ]
# 05 Sep 06:27:59 BINK Modulation               V.34+
# 05 Sep 06:27:59 BINK Carrier Freq    ( Hz )   1959/1959
# 05 Sep 06:27:59 BINK Symbol Rate              3429/3429
# 05 Sep 06:27:59 BINK Trellis Code             64S-4D/64S-4D
# 05 Sep 06:27:59 BINK Nonlinear Encoding       On/On
# 05 Sep 06:27:59 BINK Precoding                Off/Off
# 05 Sep 06:27:59 BINK Shaping                  Off/Off
# 05 Sep 06:27:59 BINK Preemphasis     (-Db )   6/4
# 05 Sep 06:27:59 BINK Recv/Xmit Level (-Dbm)   28.7/11.9
# 05 Sep 06:27:59 BINK Snr             ( Db )   18.0
# 05 Sep 06:27:59 BINK Near Echo Loss  ( Db )   14.2
# 05 Sep 06:27:59 BINK Far Echo Loss   ( Db )   24.4
# 05 Sep 06:27:59 BINK Roundtrip Delay (Msec)   3
# 05 Sep 06:27:59 BINK Data Compression         V42Bis 2048/32
# 05 Sep 06:27:59 BINK Equalization             Long
# 05 Sep 06:27:59 BINK Fallback                 Enabled
# 05 Sep 06:27:59 BINK Protocol                 Lapm Srej 244/15
# 05 Sep 06:27:59 BINK Speed                    9600/31200
# 05 Sep 06:27:59 BINK Last Call                00:00:57
# 05 Sep 06:27:59 BINK Disconnect Reason        Disc Received

Note that it negotiated the highest symbol rate (3429), yet my Rx speed
actually trained DOWN during the call, from 12k to 9k6, although my Tx
speed was 31k2.  And a S/N ratio of just 18db?  What a bloody joke!

Beats me what Telstra is doing to our local lines...  :(

Regards, Bill
@EOT:

--- MsgedSQ/2 3.50
* Origin: Logan City, SEQ (3:640/305.9)
SEEN-BY: 50/99 620/243 623/630 625/100 640/201 206 230 305 306 311 702 820
SEEN-BY: 640/821 822 823 829 711/401 409 410 413 430 808 809 899 932 934
SEEN-BY: 712/515 713/888 714/906 800/1
@PATH: 640/305 820 711/409 808 934

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