Ericsson iPECS-100 - 2.50 LNR (LAST NUMBER REDIAL)

iPECS-LIK
Feature Description & Operation Manual
Issue 6.1
105
SMDI Protocol
There are three types of SMDI messages. Within each message is an “Action Code”, which
defines the function or required action of the AA/VM system. Fields within the messages also
define the called/calling station and station status. The various message types and definition of
the fields are shown in the chart below.
Type I message
cr lf MD ggg mmmm a xxxxxxxxx sp yyyyyyyyy sp cr lf^Y
Type II message
cr lf MD ggg mmmm a xxxxxxxxx sp sp cr lf^Y
Type III message
cr lf MD ggg mmmm a sp yyyyyyyyy sp cr lf^Y
Field Description
cr carriage return
lf line feed
MD Message Desk
ggg Message desk number, AA/VM system, default
001
mmmm Message Desk terminal, 0001-9999, VM port
a action code
xxx...x called station number or station calling the VM
group
yy…y calling station number
sp ASCII space character
^Y end of SMDI message, control + Y (0x19)
The following table provides detailed information on the meaning and function of the various
SMDI messages used.
Table 2.38.3-1 SMDI Messages
Action
Code
Reason
Purpose
In-band code
Message
Type
SMDI
Message MD
001 0001-
A
Unconditional forward to VM
Put Mail
P#
II
A xxxxx yyyyy
B
Called Station busy
Busy Mail
P#3P
II
B xxxxx yyyyy
C
Disconnect, connected party
disconnect
*****
II
C xxxxx yyyyy
D
Direct Fwd to VM group
Get Mail
P##
II
D xxxxx yyyyy
E
Error, invalid number
Error
P#*5P
II
E xxxxx yyyyy
H
Two-way Record
record
None
II
H xxxxx yyyyy
I
DND
DND
P#*6P
II
I xxxxx yyyyy
N
No Answer
No Answer
P#*4P
II
N xxxxx yyyyy
R
Direct CO/IP ring to VM group
AA
None
III
R xxxxx yyyyy