Nera saturn bp Technical Manual page 15

S y s t e m D e s c r i p t i o n S y s t e m D e s c r i p t i o n S y s t e m D e s c r i p t i o n
MES or Fixed Call Release
MES
Mobile Earth Station
ON-HOOK.
ESC
MES switches to "In-band
signalling" mode and sends
6 frames of "Channel
Release" SUs,
then turns off carrier.
ON-HOOK.
ESC
MES switches to "In-band
signalling" mode and
sends 6 frames of
channel release SUs,
then turns carrier off.
Saturn Bp Portable – Technical Manual
INMARSAT-B
LES
Land Earth Station
Coordination
MES-SIG
Clear forward.
Observes MES
carrier off, then turns
off LES carrier and
sends "Notification of
Channel Release"
LESI
SU to NCS.
Removes MES from
NCS busy list, and
Removes MES from
updates channel
LES busy list. status table.
Terrestrial side
ON-HOOK
Switches to "In-band
signalling" mode and
sends channel
LES-SIG
release SUs.
(Delay up to 2 min if
called party)
MES-SIG
Observes MES
carrier off, then turns
off LES carrier and
sends "Notification of
Channel Release"
LESI
SU to NCS. Removes MES from
NCS busy list, and
updates channel
Removes MES from
status table.
LES busy list.
NCS
Network
Station
Communication Sequences Cont'd
13