Hardware manual

5901 High Speed Dialup Modem Hardware Manual

October 19, 2007

10.7.6 %Q - Report Line Signal Quality

Reports the line signal quality (DAA dependent). Returns the higher order byte of the EQM value.

Based on the EQM value, retrain or fallback/fall forward may be initiated if enabled by %E1 or

%E2.

Command: AT%Q

Response: 015

Result Codes:

OK If connected.

ERROR If not connected, or connected in 300 bps, V.23, or fax modes.

10.7.7 %Un - Select µ-Law or A-Law Codec Type

This command selects µ-Law or A-Law codec type for V.90 and K56flex modulation. This

command also stores the selected setting directly to NVRAM. The default value is country specific.

Command: %Un

n Decimal number corresponding to the selected option.

0 Selects µ-Law.

1 Selects A-Law.

Result Codes:

OK n = 0 or 1

ERROR Otherwise.

10.8 AT* Command Set

10.8.1 **- Load Flash Memory

The linear flash memory uploader 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 the data to the flash

memory device. The linear flash memory downloader allows the flash memory connected to the

modem external memory bus to read and saved. This process transfers (downloads) the current

modem firmware (data) to the host computer. Uploading new firmware to the flash memory or

downloading existing firmware from 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. If the user wishes to

upload new firmware to the modem, he should load the uploader FLM. If the user wishes to

download existing firmware from the modem, he should load the downloader FLM. In either

case, the data transfer is done via an ASCII transfer. 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. If the user wishes to upload new firmware to the modem, then he will then load the new

modem firmware which the uploader FLM will then program into the flash memory device.

This transfer is done via XMODEM transfer. If the user wishes to download existing