3Com NETBuilder SI, SuperStack II ISDN on the WAN Port (43x, 44x, 53x and 54x), This section describes three scenarios using the built-in ISDN port:

80 CHAPTER 7: ADVANCED CONFIGURATION OF PORTS AND PATHS
ISDN on the WAN
Port (43x, 44x, 53x
and 54x)
This section describes three scenarios using the built-in ISDN port:
■Scenario 1: Using Each B Channel Separately
■Scenario 2: Using Both B Channels Together
■Scenario 3: Connecting to Multiple Destinations
Dial number list A dial number list allows the software to
select a phone number from a list of
destination phone numbers associated with
a port or virtual port. Numbers in the dial list
are selected sequentially. The dial number list
is required.
Procedure
included in
scenarios
More
information: See
Chapter 9
Bandwidth-on-
demand When the system detects traffic congestion on a port, you can enable
bandwidth-on-demand to automatically
bring up more lines either from a dial pool or
from another path assigned to the same
port.
You specify the bandwidth that a port
should operate at normally, then define the
maximum amount of bandwidth above this
setting that the port can have.
See page 91
Disaster recovery If the primary line fails, the bridge/router can
use a reserved dial-up line as back-up. See page 92
Table 17 Bandwidth Management Features for Dial-Up Lines (continued)
Bandwidth
Management
Feature Description Location