ZyXEL Communications 2864 Series, User Manual, Page: 74 / 267

6–8
QUALITY ACTION
DEFAULT DIAL
DIAL BACKUP
GUARD TONE
(For V.22 and V.22bis answer mode operation).
AUTO RE-
TRAIN
AT*Q1
Retrains automatically when poor signal quality
is detected.
S41.2=1
extends retrain time out
to 5 minutes.
+ ADAPTIVE
RATE
AT*Q2
Falls back automatically to next lower speed
when poor signal quality is detected. Falls for-
ward automatically to the next higher speed
when the signal quality is improved. (Default)
DISCONNECT
AT*Q3
When poor signal quality is detected, the mo-
dem disconnects itself.
NORESPONSE
AT*Q0
No response to poor signal quality.
PH0 - PH49
AT*D0
...
AT*D49
Default dial pointer. This will be the first phone
number displayed in the
DIAL MEMORY menu
(default: PH0 ). If the DTR option 108.1 is ac-
tive, a DTR OFF-ON transition causes the mo-
dem to dial the number stored in the memory
address selected (memory address 0 to 49).
(See also
S35b4
)
+ DISABLED
AT*B0
Leased line dial backup disabled. (Default)
PH0 - PH49
AT*B1
...
AT*B50
When a leased-line cannot continue operation,
the originate mode modem will automatically
dial the number stored in the memory address
selected. The answer mode modem also needs
to select a non-zero memory address to enable
answering at the dial-up line during dial back-
up. (See also
S44b2
)
+ NONE
AT&G0
No guard tone provided. (Default)
RESERVED
AT&G1
Reserved.
1800 Hz
AT&G2
1800 Hz guard tone provided.