Honeywell ERX, User Manual, Page: 27 / 84

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AT Commands Method
The AT command method is accomplished by sending Hayes AT-type commands out the serial
I/O port to a generic-type modem, such as the Messenger Modem. This method has the ERX
recorder controlling the Hayes compatible modem.
To use this method, set the following items:
Item Code Set to
333 Call-In Trigger 1 Alarm Call-In only
789 Modem AT Enable 1 Call-In via AT commands
780 Modem Init String Initialization command of the Modem
Default: ATE0Q0V0X4
781 Modem Dial String Command sent to indicate dialing
Default: ATDT
782 Modem Hang-up String Command sent to modem for hang-up
Default: ATH
784 Alarm Call-In Phone# Phone number to call due to an alarm
786 Modem Retry Interval A Time (minutes) between short-term retries
Default: 5
787 Modem Retry Interval B Time (minutes) to wait before trying again if all
short-term retries have failed
Default: 1440
788 Modem Retry Count A Number of short-term retries
Default: 3
Scheduled Call-In Method
The Scheduled Call-In feature requires the ERX Recorder to issue AT commands to a generic
modem or to a Messenger modem. This feature, designed to interface with third party software
applications that can accept a scheduled call-in from a remote site.
To use this method, set the following items:
Item Code Set to
333 Call-In Trigger 2 Scheduled Call-In only
334 Scheduled Call-In Date Date of call
335 Scheduled Call-In Time Time of call
339 Scheduled Call-In Phone # Phone number to call at schedule time
789 Modem AT Enable
1 Call-In via AT commands
780 Modem Init String Initialization command of the Modem
Default: ATE0Q0V0X4
781 Modem Dial String Command sent to indicate dialing
Default: ATDT
784 Alarm Call-In Phone# Phone number to call due to an alarm
782 Modem Hang-up String Command sent to modem for hang-up
Default: ATH
786 Modem Retry Interval A Time (minutes) between short-term retries