User`s manual

U.S. Robotics I-modem Command Reference
Querying • Page 12-5
I6 Display a diagnostic summary. During a connection, the I-modem monitors
and stores information about link operations. When the call is ended, you
can request a diagnostic summary.
The duration of the last call or the real time is displayed, depending on the
Kn setting.
For calls under data compression, the number of characters sent may be
less than the number of octets sent, due to buffering operations.
ati6
USRobotics Courier I-modem with ISDN/V.34 Link Diagnostics...
Chars sent 0 Chars Received 0
Chars lost 0
Octets sent 0 Octets Received 0
Blocks sent 7 Blocks Received 5
Blocks resent 0
Retrains Requested 0 Retrains Granted 0
Line Reversals 0 Blers 0
Link Timeouts 0 Link Naks 0
Data Compression NONE
Equalization Long