ADTRAN ISU 128 - Manual (Page 51)

Chapter 6. Configuration
36 ISU 128 User Manual 61202.029L2-1
Auto Answer
The ISU 128 auto answer parameter can be configured in one of three ways:
Disabled, Enabled, or Dump all calls.
Disabled
When Disabled is selected, the ISU 128 will not automatically answer an in-
coming call. The AT answer command (ATA) must be issued to the ISU 128
before it accepts the incoming call. The ringing call can be dumped using the
Hang up line
command, or answered using the Answer Call command.
These commands are listed under the Dial branch of the main tree. See the
chapter Dial Options for more detail.
Enabled
When Enabled is selected, the incoming call is answered. If that call is a
BONDING call and requires two B channels, the second call is answered. If
the unit is configured for a call that uses only one B channel, such as 56 kbps
or 64 kbps, the ISU 128 will not accept a second incoming call.
Dump all calls
When Dump all calls is selected, the ISU 128 will not accept any incoming
calls. This keeps the line clear for outgoing calls.