PairGain 150-1111-75, Руководство пользователя

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150-231-175-01, Revision 01 Appendix D - Compatibility
HLU-231 List 7E September 23, 1998 53
A
PPENDIX
D - C
OMPATIBILITY
T1 R
EPEATER
S
HELVES AND
R
ELATED
E
QUIPMENT
The HLU-231 List 7E is compatible with the following T1 repeater shelves and associated equipment:
•
PairGain HMG-317 (28-slot, 23-inch shelf)
•
PairGain LS-417 (23”)
•
PairGain HCS-418 (19”)
•
PairGain HCS-402 (2-slot))
•
AT&T 220 Office Repeater Bay (ORB)
•
AT&T Small Cross Section Shelf (SXSS)
•
Kentrox 220
•
Wescom
®
342-30
H
I
G
AIN
D
OUBLER
C
IRCUIT
D
EPLOYMENT
All generations of HiGain HLU and HRU modules are compatible with each other. Although all HiGain doublers
are backward-compatible with all prior HLU and HRU models, some of the circuit application enhancements of
newer doubler models require that all circuit modules be of the same vintage in order to realize these
enhancements. Enhanced doubler applications preclude the mixing of newer doubler models with older models of
the HRU and HLU.
Table 18 on page 54 provides a matrix of HiGain doubler deployment rules to achieve maximum circuit
enhancement. It lists:
•
Maximum number of doublers allowed for a given circuit, depending upon the doubler and line unit models
used to implement the circuit.
•
Any restrictions on the HRU models.
The ALM option must be disabled (DIS) when using the Kentrox 220 T-Term shelf. This is
required to resolve a conflict between the HLU alarm relay output and the Kentrox external
equalizer output. Both use pins 20 and 21.
All spans are fully CSA-compliant unless otherwise specified. Circuits that use more than one
type of doubler are governed by the most limiting doubler rules. For example, if the HDU-451 is
used with the HDU-409, use the HDU-451 deployment rules.