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(ASCEND) P75 and X2
I wondered how well an X2 modem would work attached to the POTS port of
a P75. My expectation was that with only 1 foot of analog (between
the modem and the P75) it should do real well.
So I attached a USR sportster to my analog port and called the USR
test line (888-877-9248). This was a pre-X2 sportster, but the idea
behind the test line is to test the line for X2 before you buy one.
Well, the short answer is that the USR test identified my line as
marginal saying I should expect degraded performance.
Whats wrong here?
Here is the full output of the test.
CONNECT 31200/ARQ
CONNECT 26400/ARQ/V34/LAPM/V42BIS
CONNECT 115200 / 05-28-97 (08:18:11)
(Error Correcting Modem Detected)
USR Support BBS - Node 36 - Total Control Rack
PCBoard (R) v15.3/250 - Node 36
Testing your system capability...
Test returned code 3
ZDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD?
3 x2 is possible on this connection, but you are likely to 3
3 experience reduced performance. 3
3 3
3 Since line conditions can change from call to call, we recommend 3
3 that you make several calls to this test system to ensure an 3
3 accurate diagnosis. If you have multiple phone lines available 3
3 for use, we recommend that you try calling this system from each 3
3 line. 3
3 3
3 Performance degradation is typically caused by noise in your 3
3 local phone lines. 3
3 3
3 It's important to remember that telephone network configurations 3
3 can change, so your chances of making high-speed connections may 3
3 improve over time. 3
@DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDY
ZDDDDDDDDDDDDDDDDDDDDDDDBDDDDDDDDDDDDDDDDDBDDDDDDDDDDDDDDDDDDDDDDDDDDDDD?
3 x2-STATS Version 1.05 3 05-28-97 08:18 3 Caller 1947660/36 3
CDDDDDDDDDDDDDDDDDDDDDDDADDDDDDDDDDDBDDDDDADDDDDDDDDDDDDDDDDDDDDDDDDDDDD4
3 Elapsed Time 00:00:34 3 Modulation V.34+ 3
3 Blocks Received 13 3 Speed 28800/31200 3
3 Blers 2 3 Symbol Rate 3429/3429 3
3 Blocks sent 66 3 Carrier Frequency 1959/1959 3
3 Link Naks 0 3 Trellis Code 64S-4D/64S-4D 3
3 Blocks resent 0 3 Nonlinear Encoding ON/ON 3
3 Link Timeouts 0 3 Precoding OFF/OFF 3
3 Chars sent 3072 3 Shaping OFF/OFF 3
3 Octets sent 1418 3 Preemphasis 4/2 3
3 Chars lost 0 3 Rx Lev/TX Lev/SNR 27.4/11.1/39.1 3
3 Chars Received 0 3 Echo Loss Near Far 3
3 Octets Received 25 3 Roundtrip Delay 45 3
3 Protocol LAPM 3 Retrains Request/Grant 0/0 3
3 Block Size 128 3 Fallback Enabled 3
3 Window Size 15 3 HST Line Reversals 0 3
3 Compression V42BIS 3 HST Equalization Long 3
3 Dictionary Size 2048 3 SV: 03/21/97 DSP: 03/17/97 3
3 String Length 32 3 Reason: Online 3
@DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDADDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDY
ZDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD?
3 -30 3 y \ \ \ \ \ \ \ \ y y y y y y y y y y y y y y y y 3 0 3
3 -32 3 y [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ \ \ \ y y y y 3 2 3
3 -34 3 y [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ \ y y 3 4 3
3 -36 3 [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ y y 3 6 3
3 -38 3 [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ \ y 3 8 3
3 -40 3 [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ y 3 10 3
3 -42 3 [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ y 3 12 3
3 -44 3=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=[=\=3 14 3
3Level@DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDYAtten3
3 0 0 0 0 0 0 1 1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3 3
3 1 3 4 6 7 9 0 2 3 5 6 8 9 1 2 4 5 7 8 0 1 3 4 6 7 3
3 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 0 5 3
3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3
@DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDY
Minutes Used: 1
Thank you for calling the U.S. Robotics BBS
=======
Ken Mandelberg | km@mathcs.emory.edu
Emory University |
Dept of Math and CS | Phone: Voice (404) 727-7963
Atlanta, GA 30322 | FAX 727-5611
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