is the band class, 1=800 MHz, 2=1900 MHz, A-F is the band (Z indicates not registered on
network), 4152 is the SID, i.e. the cell tower ID, (99999 indicates not registered on network).
If the modem came with a wired antenna, try moving the antenna from place to place to find the
location that gives the best signal quality. After relocating the antenna, issue the:
ATDT
<phone
number to call> command to check for a connection.
7.8 I Set Up Dial-Up Networking On My Computer, I Am Able To
Connect To The Packet Data Network By Calling #777, But
The Modem Fails To Authenticate My Username And
Password.
Close Dial-Up Networking. Make sure the modem settings are correct for 1xRTT packet data
calls. Using terminal emulation software such as HyperTerminal, query the modem with the
following commands:
AT$QCQNC?
AT$QCMDR?
To enable 1xRTT calls, issue the following commands to the modem:
AT$QCQNC=0
AT$QCMDR=3
Close the terminal emulation software. Attempt to connect again via Dial-Up Networking. Please
see section 5.2,
Configuring Dial-Up Networking
, for more information on the Verizon username
and password format.
7.9 What Is The AT Command To Change The Baud Rate Of The
Modem?
AT+IPR=
<baud rate>
Valid data rates are:
300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200 bps.
Additional valid data rates for
USB devices only
, such as the CDM819u:
230400 bps
For example,
AT+IPR=115200
WARNING:
Only change to 230,400 if you have a serial COM port that supports that speed.
7.10 What Is The AT Command To Check The Current Baud
Rate?
AT+IPR?
7.11 What Is The AT Command To Change The Flow Control?
AT+IFC=
<DCE_by_DTE>,<DTE_by_DCE>
Where:
<DCE_by_DTE>
Specifies the method to be used by the DTE to control the flow of
received data from the DCE.
<DTE_by_DCE>
Specifies the method to be used by the DCE to control the flow of
transmitted data from the DTE.
By default the modem is set up as
AT+IFC=2,2
to allow hardware flow control in both
directions. The valid numeric variables for the
+IFC
command are as follows:
