Sierra Wireless DART 200 CDPD Modem manual Troubleshooting registration failure

DART 200 CDPD Modem User’s Guide 2 Installation and Setup

5 NEI successfully registered

The descriptions of S-Registers 56 and 126 usually give a good idea of what the problem is. The following section describes some of the most common conditions leading to registration failures.

Troubleshooting registration failure

The most common conditions leading to registration failures and possible solutions are listed in Table 2-2. If your problem does not appear in Table 2-2, or if after checking the conditions you cannot find the problem, contact your carrier for assistance. If your carrier cannot find the problem, then contact the modem supplier for guidance

Table 2-2. Registration failure troubleshooting

Condition	Result	Solution
	Code
Weak signal	0 or 254	1. Verify that the RSSI is adequate. Refer
strength		to Channel acquisition, p. 2- 10, for
		instructions.
		2. If you are mobile, the signal could be
		temporarily out of range. If you are
		stationary, you could be in a marginal
		reception area. If you are stationary
		and have a magnetic mount antenna,
		relocate the antenna while observing
		S-Register 102. The objective is to get
		a less negative value.
		3. If this does not improve the signal, or
		if you are mobile use a better (higher
		gain) antenna. Do not use an antenna
		with gain greater than the FCC
		allowed maximum of 3 dB.
Wrong side	3 (invalid	Check that you are operating on the same
specified	NEI)	side (channel range) as your carrier,
		because if there are two CDPD carriers in
		your area you may have acquired a channel
		on the wrong system.
		1. Use the AT&V command to view the
		\Nn parameter, where n specifies
		which side (1 = A side, 2 = B side)
		you are operating on.
		2. Correct the side setting, if necessary.

PN1197-00 Revision 1.0 2-17