| Sierra Wireless DART 200 CDPD Modem

DART 200 CDPD Modem User’s Guide

Table 2-2. Registration failure troubleshooting (cont.)

Condition	Result	Solution
	Code

Power supply	Not	The DART operates on a voltage of 11 to
problem	applicable	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	251, or 252 in	Registration problems can be caused by the
network	S-Register 56	MDIS, or by the network beyond. If you
problem		are operating in an area where CDPD
		service is new or has recently had software
		changes then this is a possibility.
		OR
	250 in	If your serving MDIS is different than your
	S-Register 56	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

Sierra Wireless, Inc.

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