PairGain 150-1592-02, Руководство пользователя

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150-402-102-01, Revision 01 Product Overview
HRU-402 List 2 July 27, 1998 3
A
PPLICATIONS
The HiGain system provides a cost-effective and easy-to-deploy method for
delivering T1 service over a single metallic pair. Conventional in-line T1
repeaters, cable pair conditioning, pair separation, and bridged tap removal
are not required.
Each cable pair loop has less than 35 decibel (dB) of loss at 196 kHz with
135
Ω
driving and terminating impedances. Table 1 provides a guide for the
loss of various cable gauges at 196 kHz and 135
Ω
. Table 1 applies to the
HDSL cable pairs between the HLU, HRU, and HDU modules. Without
specific insertion loss measurement data, add 3 dB for each bridged tap and
1 dB for each cable gauge change.
HiGain systems:
•
operate with any number of other T1, Plain Old Telephone Service
(POTS), or other HiGain systems sharing the same cable binder group.
•
can be used with customers requiring T1 service on a temporary or
permanent basis.
•
provide a means of quickly deploying service in advance of fiber-optic
transmission systems.
•
are easily installed allowing service to be provided within hours. Fiber
optic systems can be installed and cut-over from the installed HiGain
system. The installed HiGain system can then be easily removed and
utilized elsewhere.
The HRU-402 List 2 can be used with all HiGain doublers and doubler
compatible line units for two or three span applications. The remote unit can
Table 1. HDSL Loss Over Cables
Cable Gauge Loss at 196 kHz (dB/kft)
Ω
per kft
26/0.4 mm 3.88 83
24/0.51 mm 2.84 52
22/0.61 mm 2.18 32
19/0.91 mm 1.54 16