Interphase iSPAN 5535 PRI, User Manual

Page: 43 / 168

Chapter 3: Connecting to the Line
iSPAN PRI PCI ISDN Users Guide
23
European E1/PRI Line
When you connect the adapter to a European E1/PRI line, first
determine the appropriate connection method, cabling
requirements, and link requirements.
This section describes the method and requirements for
connecting the adapter to a European E1/PRI line.
Connection Method
Generally, your E1/PRI carrier provides a Network
Termination 1 (NT1) device to interface between the WAN
adapter and the metallic interface of the WAN. You need to
connect the WAN adapter to the NT1.
E1/PRI Cabling Requirements
W
ARNING
Before connecting the cable, read Telephone Lines
Unsafe Voltages in the Safety Precautions section at the
front of this manual.
The cable between the adapter and the NT1 must meet the
following standard E1 attenuation and transmission
requirements:
• 120 Ohm
• two twisted pairs, category 3 or better
• maximum length: 200 m (655 feet)