User's Manual

Interface Specification Document Rev. -
Cellular Radio Module CRM4250/4200
Company Confidential
Standard Communications Corp. -19- November 20, 2000
89H Command Service Status Query
This message is originated by the host in order to confirm the availability of cellular
service.
Direction: Host to radio
Mode: All
Syntax: | SOF | LEN | 89H | FCS |
Usage: This command is used by the host to determine if service is
available before initiating a 'send' command. It can also be
used for monitoring the integrity of the cellular service.
89H Command Service Status Response
This message is sent to the host in response to a Service Status Query.
Direction: Radio to host
Mode: All
Syntax: | SOF | LEN | 89H | aa aa bb bb cc dd ee FCS |
Where: aa aa = current received system SID in hex format
(or 0 = no service available)
bb bb = current channel (MS byte first)
cc = current RSSI reading
dd = Reserved
ee = Radio Service Status
- bit 0 Reserved Value could be 0 or 1
- bit 1 Authentication Enabled
- bit 2 Carrier is capable of handling Authentication
- bit 3 Reserved
- bit 4 Reserved
- bit 5 Reserved
- bit 6 Reserved
- bit 7 Reserved
-
Usage: This message is an automatic response to the Service Status Query
command.