Stratus U916 E1, Installation Manual

Page: 21 / 76

Cabling Specifications
Overview 1-5
N O T E
For connection to an E1 circuit that requires a 75-ohm
BNC termination, a G.703 75- to120-ohm adapter
(Stratus Part Number B333) is available.
To connect to a T1 line, you must have one channel service unit/data service unit
(CSU/DSU) for each U916 PCI card port you intend to use (four ports per card). The
connection from the U916 PCI card to the CSU/DSU also requires an eight-pin RJ-48C
connector (Figure 1-3). To make the connection(s) from the card to the CSU/DSU(s),
one RJ-48C cable is required for each connection between a U916 PCI card port and
a CSU/DSU (Figure 1-4).
N O T E S
1. The maximum length of the cable is 655 feet
(approximately 200 meters) without a repeater.
2. All configured ports not in use should be terminated
with a loopback plug to avoid performance
degradation. Performance degradation does not
occur on an unconfigured port. Loopback plugs are
not supplied by Stratus. Stratus recommends the
following vendor as a supplier for loopback plugs:
Radisys Corporation (www.radisys.com). Telephone
in the USA at 800-950-0044 and in Europe at 31 36
546 1070. (Radisys Part Number 87H3588, ARTIC
1000/2000 1 Port RJ-48 Plug). Loopback plugs may
also be constructed using a standard RJ-48 plug with
a jumper from pin one to pin four and a second jumper
from pin two to pin five.
Figure 1-3. RJ-48C Connector