PairGain HiGain HRE-420 List 1B, Руководство пользователя

Страница: 10 / 16

Revision 01 December 22, 1997 150-420-112-01
6 PairGain Engineering - Plant Series HRE-420 List 1B
Since the HDSL signals are bi-directional, they do not carry a ”transmit” or
“receive” designation. With reference to T1 terminology, however, Loop 1 is
called the “receive pair” and Loop 2 the “transmit pair.”
To connect the HDSL wires:
1 Connect HDSL LOOP 1 (IN) to TB1-3 (T) and TB1-4 (R).
2 Connect HDSL LOOP 2 (IN) to TB1-5 (T1) and TB1-6 (R1).
DS1 HRU Connections to CI
The HRU DS1 CPE interface ports can be connected to either the RJ-48C (see
Figure 5 ), located on the rear panel of the HRE-420, or directly to TB1. If TB1
is used, connect the DS1 output from the CPE (XMT) to TB1-9 (T) and
TB1-10 (R). Connect the DS1 input to the CPE (RCV) to TB1-7 (T1) and
TB1-8 (R1).
Figure 5. HRE-420 List 1B, RJ-48C Pin Assignments
If the leads are reversed, a CHREV message displays in the ALARMS
display field when viewing the Span Status screen (accessed through
a dumb terminal connected to a HiGain Craft port). This condition
does not affect system operation but should be corrected to avoid any
confusion regarding the identities of the 2 HDSL loops.