Mitel SX-200 EL, Technician'S Handbook

Page: 97 / 262

Troubleshooting and Repair
87
Tr
oub
le
sho
oting
The following is a PMS message format that enables a telephone’s
message waiting lamp.
Message Formats from PBX to PMS
Maid in Room status
Maid in Room status is sent as a 10-character message, as follows:
_ _ _ _ _ _ _ _ _ _
function code
STS
status code n
space (n is assigned room status code
)
station number nnnnn
(with trailing spaces)
Message Registration of Outgoing Trunk Calls
Message Registration of Outgoing Trunk Calls status is sent as a
12-character message, as follows:
_ _ _ _ _ _ _ _ _ _ _ _
function code
MR
space
status code nnnn
(nnnn is a 4-byte peg count)
station number nnnnn
(with trailing spaces)
PBX and PMS 5-digit Extension Number Formats
The extension number is sent between the PBX and the PMS as a
5-digit number. Numbers that are fewer than 5 digits include spaces:
PBX to PMS extension number nnnnn with trailing spaces
PMS to PBX extension number nnnnn with leading spaces
^B M W
space
1
space
space
2 1 2 9 ^C
Start Trans-
action STX
The CTRL
(^) B charac-
ter signals the
start of a
PMS mes-
sage
End Transac-
tion ETX
The CTRL (^) C
character signals
the end of a
PMS message
Function Code
The MW fol-
lowed by a space
indicates that the
PMS requests a
message waiting
function
Status Code
1 followed by
a space turns
on the mes-
sage waiting
lamp. 0 turns
the lamp off
Station’s Extension
(Room) Number
Identifies the exten-
sion number of the
telephone on which
the message waiting
lamp lights. The PMS
inserts leading
space(s) to indicate
that no number is
present