Westermo IDW-90 AT - Manual (Page 90)

90 6620-3200
10. Diagnostic using analogue chipset status report
For sophisticated diagnostic and debugging of analogue connections the following
command is available.
!#UD – Last Call Status Report
!#UD is an action command requesting reporting of logged operation events. It does
not take parameters and must be the last command in the command line.
The modem logs aspects of their operation for each call, and saves these results until
cleared by one of the following events:
1. Power off
2. Hard reset
3. Soft reset = ATZ or AT&F
4. AT!D or ATD# command issued
5. Automatic answer (e.g., set register !S0>0 and ring detected)
10.1 Data Call State Model
For purposes of this command, there are four data call states, and associated
status issues:
…-Call Setup
• Calling DCE: get dial tone, generate dial digits,
detect call progress signals.
• Answering DCE: detect ringing, detect CallerID, etc.
…-Negotiation
• V.25 calling tone/answer tone exchanges.
• V.8 or V.8bis call function negotiations.
• V-series modem carrier detection and training.
• Modem-to-modem protocols (e.g., V.42, V.42bis).
…-Data Transfer
• Bit-error rates, for each direction.
• Rate renegotiation.
• Retraining.
…-Call Termination
• protocol disconnect signals.
• carrier disconnect signals.
• loss of carrier.
• excessive error rates.