Multi-Tech Systems CDMA Wireless Modem R-SCH Selection $QCMIP

Chapter 19 – Qualcomm Defined AT Commands for CDMA Operation

Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C 158

R-SCH Selection $QCMIP

Description: This command is used to enable or disable mobile IP.

Values: <Val>

0: Mobile IP disabled, Simple IP only.

1: Mobile IP preferred. In the initial MIP registration, if the network does not support

Mobile IP, then the mobile automatically reverts to Simple IP (force a PPP renegotiation

by sending a LCP C-Req).

However, if a Mobile IP session is registered, and then enters a network that does not

support Mobile IP, the mobile will drop the session and inform the upper layers of the

failure (for example, by dropping DCD to a laptop).

2: Mobile IP only. The mobile will make data calls only when Mobile IP is supported in

the network. During a MIP session, if the mobile hands off to a network that does not

support MIP, then the mobile will drop the session and inform the upper layers of the

failure (for example, by dropping DCD to a laptop). This value is stored in NV. The

default value is 0.

Note 1: When the AT$QCMIP value is changed to 1 or 2, this modifies the value of

AT+CRM to 2. AT+CRM with a value of 2 enables network model operation. Changing the

value to 0 will reset the AT+CRM to its original value.

Note 2: This change is not supported by DMSS 5105 Release 1.0 Commercial.

Note 3: When the AT$QCMIP value is changed to 1 or 2, this modifies the value of

AT$QCMDR to 3. AT$QCMDR=3 means that the mobile tries Service Option 33 when it is in

a cdma2000 network that advertises P_REV 6 or higher. When AT$QCMIP >0 and an

attempt is made to set AT$QCMDR to less than 3, the mobile will return ERROR.

Note 4: When the AT$QCMIP value is set to 1 or 2, this changes the value of AT$QCPKND

to 0. This means that the mobile must see a dial string (such as ATDT#777) on the serial

interface before it will originate packet data calls. When AT$QCMIP >0 and an attempt is

made to set AT$QCPKND to 1, the mobile returns ERROR.

Note 5: This AT command is for test purposes only and should not be changed by the

mobile phone user.

Syntax: Command syntax: AT$QCMIP=<Val>

Command Possible Responses

AT$QCMIP?

Note: Display the current setting

$QCMIP: 1

Note: Command is valid

AT$QCMIP=?

Note: Display the range of values

$QCMIP: (0-2)

Note: Command is valid

AT$QCMIP=0

Note: Set value to 0

Note: Command is valid