Z02205 Datasheet, PDF (23/30 Pages) Zilog, Inc. – MODEM CONTROLLER IDEAL FOR LOW POWER CONSUMPTION, SMALL SIZE REQUIREMENTS

ZiLOG
Z02205
Modem Controller
MODEM RESULT CODES
A result code is a line of text or a number the modem sends
to the terminal indicating the result of a command execu-
tion. Some CONNECT result codes indicate the telephone
line data rate. The following table provides a list of the avail-
able result codes.
Number
0
1
2
3
4
5
6
7
8
10
16
17
20
21
Word
OK
CONNECT
RING
NO CARRIER
ERROR
CONNECT 1200
NO DIALTONE
BUSY
NO ANSWER
CONNECT 2400
CONNECT 1200/75
CONNECT 75/1200
BLACKLISTED
DELAYED
Table 6. Modem Result Codes
Result Code Description
Command Line Executed without errors
The modem is in the on-line state, ready to transfer data.
The modem has detected a ring signal on the telephone line. The country
configuration may disable the modem’s ability to detect a telephone line ring
signal.
Either no carrier signal was detected when answering or placing a telephone call,
or the carrier was lost during a call. The modem also returns this response
message when the telephone line connection is broken for any reason.
An invalid command was issued, or there was an error at any place in the
command line.
The modem is in the on-line state, ready to transfer data.
No dial tone was detected when the modem took the telephone line off hook.
The modem detected a busy signal on the telephone line.
Not enough silence was detected when the @ dial modifier was used.
The modem is in the on-line state, ready to transfer data. The telephone line data
rate is 2400bps.
The modem is in the On-Line state, ready to transfer data. This modem transmits
at 1200 bps and receives at 75 bps.
The modem is in the On-Line state, ready to transfer data. This modem transmits
at 75 bps and receives at 1200 bps.
The modem will not allow any number to be dialed until after the modem is
reset.
The modem will not allow any number to be dialed now, but will allow dialing at
some future time.
PS001000-MOD0599
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