Specifications

Diagnostic Commands
Rev. 8 May.12 Proprietary and Confidential 91
!UMTSCHAN
Supporting chipsets:
• All
Note: This command is not
password-protected.
Set/report Priority UMTS Channel Selection state
Set the modem to scan a ‘priority’ UMTS channel when the modem powers up, before
scanning other frequencies. This allows you to use the modem on a test cell network
(that uses the priority UMTS channel) in an area where a UMTS network already
exists—the modem attempts to access the test network even if a cell on the normal
UMTS network would provide a better connection.
Note: If the signal is lost on the priority UMTS channel, the modem scans for another
channel. To force the modem to rescan for the priority UMTS channel, you must power
cycle the modem.
Usage:
• Execution: AT!UMTSCHAN=<flag>[,<DL_UARFC>]
Response:
OK
Purpose: Enable/disable the feature and power cycle the modem, forcing cell
reselection.
• Query: AT!UMTSCHAN?
Response:
Enable: <flag>
Channel: <DL_UARFCN>
OK
Purpose: Return the current <flag> setting, and DL_UARFCN (if <flag> = 1).
Parameters:
<flag>
• 0 = Disable priority UMTS channel selection. When the modem power cycles,
cell reselection occurs using normal scanning procedure.
• 1 = Enable priority UMTS channel selection. When the modem power cycles, cell
reselection occurs—the modem scans DL_UARFC first, then uses normal
scanning procedure if it is unavailable.
<DL_UARFCN> (Valid downlink UARFCN based on the operating band)
• Only used when <flag> = 1 (enable)
• Examples: 10700, 9800
Table 4-2: Diagnostic command details (Continued)
Command Description