Airlink Raven II - Manual (Page 22)

AirLink Raven II CDPD Modem
Page 18 AirLink Communications, Inc.
2.4 Finding CDPD Service
When the modem is reset, it will start searching for CDPD service on the side
specified. The only LED that will be on is the power On LED. The lights will
do two quick sweeps from right to left as a self-check.
Scanning - The modem will scan all the channels on the side, sort the
channels by the signal strength (RSSI) and begin searching for CDPD service
starting with the highest RSSI, the strongest signal. The Chan LED will be
flashing while it scans.
A
ir
L
ink
C om m unications
Ch
an
Lin
k
Re
g
Tx
Rx
RS
SI
Er
r Reset
CDPD Raven II
Pw
r
Acquiring Channel - When the modem finds a CDPD channel and acquires
synchronization, the Chan LED will be solid on. The RSSI LED might be
solid on, fast blinking, slowing blinking or off, depending on the signal
strength.
A
ir
L
ink
C om m unications
Ch
an
Lin
k
Re
g
Tx
Rx
RS
SI
Er
r Reset
CDPD Raven II
Pw
r
Establishing a Link - Once the modem acquires a CDPD channel, it will
request a Temporary Equipment Identifier (TEI), resolve the link
parameters, and establish the link layer connection. Once these steps are
accomplished, the Link LED will be illuminated. The TxRx LED will flash
briefly during this time.
A
ir
L
ink
C om m unications
Ch
an
Lin
k
Re
g
Tx
Rx
RS
SI
Er
r Reset
CDPD Raven II
Pw
r