Install Additional Hardware
Install and Administer ISDN - BRI
570
SI Installation and Upgrades
June 2004
Install and Administer ISDN - BRI
Return to Task List
NOTE:
Adding ISDN - BRI requires a service interruption when you add packet bus support and
you install TN570Ds as part of that support. Give the customer advance notice of the
scheduled addition. See
Add Packet Bus Support
on page 588 for further information.
See
BRI Terminating Resistor Installation
on page 570 for an important warning, details on the resistors,
adapters, and multipoint installation distances.
Task List: Installing ISDN - BRI
Perform these tasks to install and administer ISDN - BRI:
1
Add Circuit Packs (ISDN BRI)
on page 576
2
Install Cables (ISDN BRI)
on page 577
3
Enter Added Translations (ISDN BRI)
on page 577
4
Resolve Alarms
on page 577
5
Save Translations (ISDN BRI)
on page 577
BRI Terminating Resistor Installation
The resistors balance the cable plant between the receiver and the transmitter on the interface. When
using the TN2198 ISDN-BRI 2-Wire U Interface circuit pack, an NT1 is required. A terminating resistor
is always required near the terminal when the BRI S-type interface circuit pack (TN556D BRI 4-Wire S-
NT Line circuit pack) is used (see 5ESS Switch Integrated Services Digital Network Customer Premises
Planning Guide).
The resistor is built into the NT1 and can be one of three values, depending on the configuration and the
distance from the NT1 to the ISDN terminal. The resistor value is controlled from the NT1. A terminating
resistor adapter may be needed near the terminal and can be placed in the satellite closet or work location.
NOTE:
The 440A4 terminating resistor and 110RA1-12 terminating resistor block are UL listed.
Most new installations are the 110RA1-12 terminating resistor block.
See these BRI terminating resistor topics:
•
Important Warning for Telephone Wiring
on page 571
•
Terminating Resistor Adapter and Block
on page 571
•
Installing Multipoint Adapters
on page 573
•
Basic Multipoint Installation Distances
on page 576
Содержание MCC1
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