Wavecom W61PC V7.5.0 - Manual (Page 281)

WAVECOM Decoder W61PC/LAN Manual V7.5 SAT System  271
System Services Offered Introduction Max User Data
Rate (fax, data)
mini-C For the land mobile service, as C, not approved for
GMDSS, compact all-in-one unit housed in the antenna
FleetBroadband Maritime version of BGAN
SwiftBroadBand Aeronautical version of BGAN
FleetPhone Maritime, regional satellite phone
LandPhone Regional satellite phone, same as FleetPhone
ISatPhone Global satellite phone service based on GMR-2 2008 Data: 9.6 kbps
RF Channels
Band Direction Frequency
L-Band Frequency Range Receive (Satellite – MES) 1525.0 – 1559.0 MHz
Transmit (MES – Satellite) 1626.5 – 1660.5 MHz.
C-Band Frequency Range Receive (Satellite – NCS/LES) 3600.0 – 3629.0 MHz
Transmit (NCS/LES – Satellite) 6425.0 – 6454.0 MHz
Logical Channels
The logical channels are described in the table below.
Name Type Function Direction
NCS Common Control Network Bulletin Board status infor-
mation
Forward (to MES)
NCS Assignment Control Channel assignment Forward (to MES)
NCS Spot-beam Identification Control Spot beam identification for MES Forward (to MES)
NCS Inter-station Control NCS-LES signaling and assignment Forward (to LES)
NCS Registration Acknowledge-
ment
Control Registration acknowledgement Forward (to MES
LES Assignment Control Stand-alone or NCS backup assignment Forward (to MES)
LES Inter-station Control LES-NCS signaling Return (to NCS)
MES Request Control Access request channel Return (to LES,
NCS)
MES Response Control Signaling response channel Return (to NCS)
MES Registration Control Initial registration Return (to LES,
NCS)
MES Call Acknowledgement Control Call acknowledgement Return (to LES)
SCPC channel User
traffic
Circuit switched Forward and return
Shared channels User
traffic
Packet switched Return
The only frequencies the MES initially knows are the frequencies of the NCSC in all regions - all other fre-
quency information is dynamically extracted from the NCS Bulletin Board or in session oriented signaling
messages. After being switched on, the MES must be told (or remembers) in which region it is currently
located, and will automatically tune to the corresponding frequency of the NCS. The terminal will then
search through the NCSS spot beam ID frequencies to identify the best spot beam.