User's Manual

* Also note that the <x_law> parameter in a +MS command overrides a previous %Un command

and a %Un command overrides the <x_law> setting specified in a previous +MS command.

6. <rb_signaling> is an optional number, which enables or disables robbed bit signaling generation

in a server modem or enables or disables robbed bit signaling detection in a client modem. The

options are:

0=Robbed bit signaling generation (server modem) or detection (client modem) disabled. (Default)

1=Robbed bit signaling generation (server modem) or detection (client modem) enabled.

Note that ATZ will reset the <rb_signaling> selection to 0. (Default)

Result Codes:

OK Valid subparameter string

ERROR Otherwise.

2.2.e Commands Preceded by **

** Download to Flash Memory

The linear flash memory downloader in the modem firmware allows flash memory connected to the modem

external memory bus to be upgraded with revised modem firmware. This process transfers (uploads) the

upgraded modem firmware (data) from the host computer to the modem which transfers (downloads) the

data to the flash memory device. Note that this command apply only to the modem with flash memory.

Programming the flash memory device is a two-step process.

1. When the AT** command is issued, the modem firmware boot loader is invoked and the user will first

load a flash load module (FLM) into the modem's RAM. The FLM contains the programming algorithm

for the flash memory device being programmed and any messages that may be sent during the load

process.

2. The user will then load the new modem firmware, which the FLM will then program into the flash

memory device.

Procedure:

1. Install in the modem a flash memory programmed with the modem firmware; ensure that the flash

memory device is programmed with the sector secure mode set to UNSECURE (AMD only), otherwise

the device connot be re-programmed in the modem.

2. Put the FLM file and the new modem firmware file (e.g., V1400DS.S37) in an appropriate directory on

the computer's hard disk.

3. Configure the communications application program for a DTE rate of between 9600 bps and 57600 bps

(57600 bps is faster) and RTS/CTS flow control. A load at 57600 bps will take approximately 2