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Chapter 6. Configuration
61200051L1-1D ISU 2x64 Dual Port ISDN Service Unit User Manual 47
Select 100 ohm On to turn on the 100 ohm termination resistance
across the S/T transmit and receive pairs. Select 100 ohm Off to
turn off the 100 ohm termination resistance across the S/T trans-
mit and receive pairs.
The SBus Termination resistors are not present on ISU 2x64 units
equipped with the integrated NT1 (part numbers 1200051L1 and
1200051L3). Setting the SBus Termination resistance to on or off
on these units has no effect on their operation and can be ignored.
LEASED LINE SERVICE
This section explains how to configure the ISU 2x64 when using a
2B1Q leased digital service or a service providing a permanent con-
nection between end points. The distance can be up to 18000 feet.
Figure 6-13
Leased Line Menu Tree
Selecting Leased Line configures the unit for leased line service
or service providing a permanent connection between end points
such as limited distance modem or LDM service.
Follow this step-by-step procedure to configure the ISU 2x64 for
Leased Line, Clock mode, Channel rate, and S Bus Termination.
Clock mode: Slave/Master
By configuring the ISU 2x64 for Master timing, the ISU 2x64 can
provide clocking for both ends of the phone line. This Master
option is intended to be used at one end of a limited distance
3=CONFIG
1=Netw. options
2=DTE options
3=Protocol
4=Quick setup
5=Security
6=Remote Config
1=Dial Line
2=Leased Line
1=Clock mode
1=Slave
2=Master
2=Channel rate
1=64k
2=128k
3=SBus Terminati
1=100 ohm On
2=100 ohm Off