Command

Options

Function & Description

Ref.

 

I12

 

Display physical layer status.

 

Ln

n=0-7

Speaker volume control. The higher

S24.4-6

 

4 *

 

the value, the higher the volume.

 

Mn

 

 

Speaker control.

S21.1-2

 

M0

 

Speaker always OFF.

 

 

M1

*

Speaker ON until call is answered.

 

 

M2

 

Speaker always ON.

 

 

M3

 

Speaker ON after the last digit is

 

 

 

 

dialed out and OFF when carrier is

 

 

 

 

detected.

 

Nn

n=0-7

Ring volume control.'N0' will

S24.0-2

 

5 *

 

disable the audio ring function.

 

O

 

 

Return to on-line state.

 

O1

 

 

Force modem to request a retrain.

 

Qn

 

 

Result code displayed.

S23.7

 

Q0

*

Modem returns result code.

 

 

Q1

 

Modem does not return result code.

 

 

Q2

 

Modem returns result code but quiet

S40.1

 

 

 

after answering on a RING (see also

 

 

 

 

S42.2).

 

Sr.b=n

 

 

Set bit 'b' of S-register 'r' to value 'n'.

 

 

 

 

'n' is a binary digit '0' or '1'.

 

Sr.b?

 

 

Display value of bit 'b' of S-register

 

 

 

 

'r'.

 

Sr=n

 

 

Set S-register 'r' to value 'n'. 'n' must

 

 

 

 

be a decimal number between 0 and

 

 

 

 

255.

 

Sr?

 

 

Display value stored in S-register 'r'.

 

T

 

 

Ton dial.

S23.1

UPX

 

 

Download firmware to the Flash

 

 

 

 

EPROM by using Xmodem

 

 

 

 

protocol.

 

AT Command Set Summaries 79

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ZyXEL Communications U-336R/RE manual Upx