IP Server 900 Hardware Installation Manual
Ordering and installing PRI circuits
C.2
•
Service Termination
— ESI recommends that the PRI circuit be terminated on an eight-pin RJ-68 (also called
a
SmartJack
). If an RJ-68 isn’t available, you may use an eight-pin RJ-48 jack. If you use an external Channel
Service Unit (CSU) be sure to turn
off
the internal CSU in the IP Server 900.
Important:
ESI recommends using Category 5 (or better) twisted-pair cable with a length of at least six feet when
connecting a cable between the PRI and CSU or Smart Jack.
•
Span Type
— When the distance from the IP Server 900 to the CSU, SmartJack, or multiplexer (all of which
are considered repeaters) is less than 655 feet use the
DSX-1
setting. For longer distances use
DS-1
. This
value is used in combination with the
Line Build-Out
setting below to define loss levels and compensation
when programming the PRI circuit in the IP Server 900.
•
Line Build-Out (LBO)
— For
long-haul
(DS-1 span) circuits, the CSU must usually be set to correct for signal
loss across the longer cabling. This is called
Line Build-Out
, and is used in combination with
Span Type
setting above to determine the attenuation levels used by the IP Server 900.
Note:
The sample order form template on the next page is available on the ESI Web site. There you can
download a
Microsoft Word
document version — listed as
Technical Update
#176
— that can be filled
out on a PC.