Zhone 100 - ISDN Backup and On-Demand

2 Description
980-001-0210G NetPath 100 User’s Manual - Installation Guide 2-3
June
1999
ISDN Bandwidth
On-Demand
Bandwidth On-Demand provides an additional network connection for a second DTE
(router) port based on a request from the DTE. In this configuration the NetPath 100
ISDN Adapter is protocol-transparent. The Router determines the protocol used.
A typical network configuration showing simultaneous Bandwidth On-Demand and
Backup connections is shown in Figure 2-3.
Fi
g
ure 2-3 T
y
pical Simultaneous Bandwidth On-Demand Confi
g
uration
The bandwidth on-demand process is described as follows:
•
User’s router detects need for bandwidth and raises DTR on its second port.
•
NetPath 100 ISDN Adapter calls predetermined number.
•
The Central Router answers the call and establishes communications with the
remote Router.
•
Communication commences between Routers.
•
User’s Router lowers DTR to terminate the ISDN connection when the
“demand” has been satisfied.
Frame Relay Cloud
ISDN Cloud
Router
CSU
Router
TA
TA
TA
TA
Bandwidth
On Demand
Bonding
Mode 1 or MLPPP
HW3DWK 
NetPath 100
Switch
Primary Switch
Backup Switch