User`s guide

XSR User’s Guide 135
8
Configuring Dialer Services
This chapter details information about the XSR’s suite of dialer functionality:
 Dial
 Ethernet Failover
 Backup Dialer
 Dial on Demand (DoD)
 Bandwidth on Demand (BoD)
 Multilink PPP (MLPPP)
Overview of Dial Services
Dial Services provide network connections across the Public Switched
Telephone Network (PSTN). Networks are typically interconnected using
dedicated lines for Wide-Area Network (WAN) connections. Dial Services can
use modems, Integrated Service Data Network (ISDN) terminal adapters
(TAs), or integrated ISDN capabilities to establish low-volume, periodic
network connections over public circuit-switched networks.
Dial Services are a cost-saving alternative to a leased line connection between
two peers and they can be implemented for different types of media for both
inbound and outbound connections.
Dial Services Features
The XSR supports the following dialer features:
 Asynchronous serial service through an external modem
 Synchronous serial