Sierra Wireless DART 200 CDPD Modem - Manual (Page 44)

DART 200 CDPD Modem User’s Guide 2 Installation and Setup
Sierra Wireless, Inc. 2-20
Table 2-2. Registration failure troubleshooting (cont.)
Condition Result
Code Solution
Power supply
problem Not
applicable The DART operates on a voltage of 11 to
16 VDC with a current rating of 2.5 amps.
Voltage level fluctuations caused by using
an unregulated power supply, or a supply
with too low a current rating will cause the
modem to experience a power reset. This
forces the modem to reset itself before it
can complete the multi-step registration
request.
The most frequent problem is too low a
current rating. The MDBS controls the
output power of the DART. The DART
may work well with a particular power
supply in a location where low power
output is required, and yet fail using the
same power supply in a different location
if the power output demands are higher.
Use a power supply with an amperage
rating of at least 2.5 amps to avoid this
problem.
MDIS or
network
problem 251, or 252 in
S-Register 56 Registration problems can be caused by the
MDIS, or by the network beyond. If you
are operating in an area where CDPD
service is new or has recently had software
changes then this is a possibility.
OR
250 in
S-Register 56 If your serving MDIS is different than your
home MDIS (usually occurs if the F-ES is
in one carrier’s territory and the DART is
registered on a different carrier’s MDIS) a
network router or link problem could cause
the registration attempt to time out.
1. View S-Register 126 to determine how
far through the registration process the
modem had progressed. Home MDIS
delay problems show up as 4 in this
register.
2. Contact your local carrier for
assistance