Cabletron Systems CSX100 series, User Manual, Page: 91 / 153

Configuring Advanced Features 77
Analog Phone Settings
The following describes how to change the default settings of a POTS router
(a router to which you may attach analog devices such as a telephone or a fax
machine) for Analog Mode, Call Preemption, and Automatic Preemption.
Default phone numbers
The interfaces are preconfigured with the following default settings:
•
If your ISDN settings are configured with two DNs (Directory Numbers),
DN1 will be associated with POTS interface 1 and DN2 will be
associated with POTS interface 2.
•
Otherwise, the default configuration is for an incoming call to ring on all
available devices attached to the POTS interfaces. An outgoing call will
use any available B-channel.
Note: This default setting can be changed using the Command Line Interface
but not Configuration Manager. Refer to Appendix D for instructions to
access the Command Line Interface.
Phone usage and data preemption
Call preemption allows you to give voice calls priority over data calls: a voice
call (depending on the configuration options) will cause a disconnect of a data
call on an ISDN B-channel.
Default : The default configuration is for both incoming and outgoing voice
calls to preempt data ( Always option).
Data calls can be preempted manually or automatically. In manual
preemption, data calls can be bumped manually by picking up the phone and
depressing the flash hook to indicate that you want to preempt.
POTS line controls
Phone lines and data preemption can be controlled as explained in the
following table: