Epson ActionNote 880C User Manual - Fax/Data Modem - Page 37

Time Independent Escape Sequence (TIES), Causes

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W Wait for Dialtone Causes the modem to look for dial tone for a specified amount of time. If dial tone or the amount of time specified by the S-register S6 times-out, the modem will then process the next command in the dial string. If a busy signal is detected, the modem will respond back to the DTE with a busy response code, and then go into offline command mode. 2.4 Time Independent Escape Sequence (TIES) The Time Independent Escape Sequence (TIES) has been developed by a group of modem manufacturers as an alternative to the Hayes Escape Sequence. TIES has been designed to work with existing communication software written for the Hayes Escape Sequence. The escape sequence is sent by the host (DTE) to return the modem to command state while in the on-line data state (connected to another modem) or diagnostic mode (&Tn commands). The DTE implements the escape sequence by sending the escape character three times, followed by a valid 'AT' command and the contents of S3 (typically a ). Upon detecting the three consecutive escape characters, the modem changes to a TIES command mode, and starts an internal Escape Prompt Delay timer (EPD) - with the time limit as defined by S12. If the EPD timer times out, the modem sends an 'OK' message to the DTE 2 - COMMAND REFERENCE 29

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W
Wait for Dialtone
Causes
the modem to look for dial tone for a specified amount of
time. If dial tone or the amount of time specified by the S-register
S6 times-out, the modem will then process the next command in the
dial string. If a busy signal is detected, the modem will respond
back to the DTE with a busy response code, and then go into off-
line command mode.
2.4 Time Independent Escape Sequence (TIES)
The Time Independent Escape Sequence (TIES) has been developed by a
group of modem manufacturers as an alternative to the Hayes Escape Se-
quence. TIES has been designed to work with existing communication soft-
ware written for the Hayes Escape Sequence.
The escape sequence is sent by the host (DTE) to return the modem to
command state while in the on-line data state (connected to another mo-
dem) or diagnostic mode (&Tn commands).
The DTE implements the escape sequence by sending the escape charac-
ter three times, followed by a valid ‘AT’ command and the contents of S3
(typically a <CR>). Upon detecting the three consecutive escape charac-
ters, the modem changes to a TIES command mode, and starts an internal
Escape Prompt Delay timer (EPD) - with the time limit as defined by S12.
If the EPD timer times out, the modem sends an ‘OK’ message to the DTE
2 - COMMAND REFERENCE
29