9. SYSTEM DESCRIPTION
9-6
Calls from Mobiles
See figure.
To make an outgoing call, you use a standard international telephone number
with the 00 prefix. The MES automatically includes information to identify itself
and the particular device that originates.
System signalling
The LES uses the identifying information of the attached device for billing
purposes.
The MES transmits the dialing information on a channel specially assigned by
the NCS to the LES.
LES routes the call over the public telecommunications networks to the intended
destination. When the called party responds, the call proceeds.
Call announcement from mobile to fixed:
The MES uses the Return Identity (RTNID) to communicate with the LES. It uses
the TermlD to identify its
IMN
number and the service in use.
The attached equipment dials the number and transmits its
MSN
number to the
MES
. The MES routes the MSN to a TermlD.
LES checks that the RTNID is commissioned before connecting the call to the
fixed net.
PSTN
Calls from Mobiles
67244700
LES Translation Table
Forward/return ID
123456/ABCDEF
123456/ABCDEF
123456/ABCDEF
123456/ABCDEF
123456/ABCDEF
T.ID
1
51
52
61
91
Type
4.8kbps speech
64 kbps data
64 kbps data
64 kbps data
4.8kbps speech
IMN
761234567
601234789
601234890
601234481
761234482
Example of MES Translation Table
MSN Service
Term.Id
20
4.8 kbps speech
60
64 kbps data (Gr.4 fax)
51
52
1
61
64 kbps data
48
64 kbps data (Gr.3 fax)
61
91
0
4.8 kbps speech
LES
Return ID
Service
Fixed net
number
2
ABCDEF
4.8kbps speech
004767244700
Call announcement
00 47 67 24 47 00
LES
+
8
5
When the MES originates a call it starts
by sending a request to the LES.
This initial request for service contains
the MES Return ID and type of service.
FELCOM 70 incorporates a configuration
table that contains Originating Id for every
device connected and type of service.
$"
$
&
#
Summary of Contents for FELCOM 70
Page 1: ...INMARSAT FLEET F77 SHIP EARTH STATION FELCOM 70...
Page 26: ...2 OPERATION FROM HANDSET 2 14 This page is intentionally left blank...
Page 90: ...5 CONFIGURATION FROM PC 5 40 This page is intentionally left blank...
Page 186: ...6 DATA COMMUNICATION 6 96 This page is intentionally left blank...
Page 215: ...APPENDIX MAINTENANCE PARTS AP 3 HPA block HPA pcb HPA CONT pcb PWR pcb DIP LNA TR block...
Page 216: ......