- MultiConnect Adapter User Guide

Chapter 10 − Modem Mode AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. MultiConnect Serial-to-Serial Adapter User Guide (S000354A) 110
Notes for AT#UD Tables
1. The modem may insert a delay (e.g., 10 ms) between information text lines.
2. The code tables include values for data and fax calls. Some of the codes are
applicable only to data calls (e.g., data compression), some to call origination (e.g., busy,
answering signal detection), and some to the answering modem (e.g., calling signal detection).
3. callCleared codes from 3.6.4/V.58-1994 – callCleared: indicates that the DCE has gone on-
hook and that the previously existing network connection has been cleared. These values are
hex values, converted from decimal in V.58. callCleared codes are described in Table 8-10.
Table 8-2. AT#UD Last Call Status Report Format
Key Value(s) Definition
0 2 digits Diagnostic Command Specification revision number, digit.digit
1 Table 8-3 Call Setup Result code
2 Table 8-4 Multi-media mode
3 Table 8-5 DTE-DCE interface mode
4 String V.8 CM octet string, same format as V.250, in quotes
5 String V.8 JM octet string, same format as V.250, in quotes
10 0-2F Received signal power level, in –dBm (0-43)
11 0-1F Transmit signal power level, in –dBm (e.g., 0-17)
12 0-64 Estimated noise level, in –dBm (e.g., 10-90)
17 0-FFF Round Trip delay, in units of ms
18 Table 8-6 V.34 INFO bit map
20 Table 8-7 Transmit Carrier Negotiation Result
21 Table 8-7 Receive Carrier Negotiation Result
22 0-1F40 Transmit Carrier symbol rate (0-8000) in symbol/s
23 0-1F40 Receive Carrier symbol rate (0-8000) in symbol/s
24 0-FA0 Transmit Carrier frequency (0-4000) in Hz
25 0-FA0 Receive Carrier frequency (0-4000) in Hz
26 0-FA00 Initial transmit carrier data rate (0-64000) in bit/s
27 0-FA00 Initial receive carrier data rate (0-64000) in bit/s
30 0-FF Temporary carrier loss event count
31 0-FF Carrier Rate re-negotiation event count
32 0-FF Carrier Retrains requested
33 0-FF Carrier Retrain requests granted
34 0-FA00 Final transmit carrier data rate in bit/s
35 0-FA00 Final receive carrier data rate in bit/s
40 Table 8-8 Protocol Negotiation Result
41 0-400 Error Control frame size in bytes
42 0-FF Error control link timeouts in transmission
43 0-FF Error control link NAKs received
44 Table 8-9 Compression Negotiation Result
50 0-2 Transmit flow control: 0=off; 1=DC1/DC3; 2=V.24 circuit 106/133
51 0-2 Receive flow control: 0=off; 1=DC1/DC3; 2=V.24 circuit 106/133
52 0-FFFFFFFF Transmit characters sent from DTE
53 0-FFFFFFFF Received characters sent to DTE
54 0-FFFF Transmit characters lost (data overrun errors from DTE)
55 0-FFFF Received characters lost (data overrun errors to DTE)
56 0-FFFFFFFF Transmit I- Frame count, if error control protocol running
57 0-FFFFFFFF Received I-Frame count, if error control protocol running
58 0-FFFF Transmit I-Frame error count, if error control protocol running
59 0-FFFF Received I- Frame error count, if error control protocol running
60 Table 8-10 Termination Cause
61 0-FF Call Waiting event count
Table 8-3. Call Setup Result Codes
Code Definition
0 No previous call (modem log has been cleared since any previous calls)
1 No dial tone detected
2 Reorder signal detected, network busy
3 Busy signal detected
4 No recognized signal detected (e.g., no signal, or nothing recognizable)
5 Voice detected * if this is a voice modem (V.253) in voice mode
7 Data Answering signal detected (e.g., V.25 ANS, V.8 ANSam)
8 Data Calling signal detected (e.g., V.25 CT, V.8 CI)
9 Fax Answering signal detected (e.g., T.30 CED, DIS)
A Fax Calling signal detected (e.g., T.30 CNG)
B V.8bis signal detected