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Message structure, A.2 message structure – Comtech EF Data SMS-7000 User Manual

Page 119

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SMS-7000 Modem Protection Switch

Remote Control Operation

Rev. 3 Draft

A–3

Table A-1. SMS-7000 Remote Control: SMS-658/SMS-758 Comparison Table (Continued)

Command

SMS-7000

SMS-658

SMS-758

Notes

TX Operational Stored Faults

TOSF_#

SMS-7000 only

RX Operational Stored Faults

ROSF_#

SMS-7000 only

Backup Modem System Stored Faults

SSF_Bn_#

SMS-7000 only

Prime Modem System Stored Faults

SSF_n_#

SMS-7000 only

Equipment Stored Faults

ESF_#

SMS-7000 only

Bulk Consolidated Status Faults

BCSF_

BCSF_

BCSF_

Different response

Equipment Type

ET_

ET_

ET_

Different response

M&C Firmware Information

MCFI_

SMS-7000 only

Data Switch Module Firmware Info

DMFI_

SMS-7000 only

IF Switch Module Firmware Info

IMFI_

SMS-7000 only

Firmware Version Status

VER_

VER_

SMS-658/SMS-758 only

Backup Multiplexer Attached

MU_Bx_yyy

SMS-7000 only

Backup Multiplexer Address

MUA_Bx_yyy

MUA_Bx_yyy

MUA_Bx_yyy

Prime Multiplexer Attached

MU_x_yyy

SMS-7000 only

Prime Multiplexer Unit Address

MUA_x_yyy

MUA_x_yyy

MUA_x_yyy

A.2 Message

Structure

The ASCII character format used requires 11 bits/character:

• 1 start bit

• 7 information bits

• 1 parity bit

• 2 stop bits

or

• 1 start bit

• 8 information bits

• no parity bit

• 2 stop bits

Messages on the remote link fall into the categories of commands and responses:

• Commands are messages which are transmitted to a switch

• Responses are messages returned by a switch in response to a command

The general message structure is as follows:

• Start Character

• Device Address

• Command/Response

• End of Message Character