User manual

MODEM MESSAGES 4-1

Chapter 4 MODEM MESSAGES

The modem responds to AT commands with Modem Messages. You can control

their format (verbal or numeric) with the V command.

In addition, the modem issues Connection Messages, when it recognizes activi-

ties on the telephone line. The X command determines which messages are author-

ised here.

Messages regarding Error correction are controlled via the W command and

with the S95 Register. The following table gives an overview of the possible mes-

sages.

Numeric/ Verbal Reason/Description

(00) OK Modem acknowledges execution of a command

(01) CONNECT 1. Modem has created a data link at 300 bps

2. Interface speed is 300 bps when link is made

3. Link is made but X0 command is on

and modem issues no information on speed

(02) RING Modem has recognized an incoming call

(03) NO CARRIER 1. “Free” signal recognized but no carrier in speciﬁed time

2. No “Free” signal recognized in speciﬁed time (S7)

3. Modem gone off-line following loss of carrier

4. Answer when engaged signal is recognized

5. Answer when no dialling tone is recognized

(04) ERROR 1. Modem has found an error in the command syntax or cannot carry

out the command line

2. Dialling blocked (X0, X1, X2 or X3 are engaged)

3. Telephone handset not replaced

(05) CONNECT

1200

1. Modem has set up a data link at 1200 bps

2. Interface speed is 1200 bps after link is made

(06) NO DIALTONE X2 or X4 is active and modem has not received a dialling tone

(07) BUSY X3 or X4 is active and modem has received an engaged tone after

dialling

(08) NO ANSWER Modem recognizes “Free” signal until time set in S7 Register has

expired

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