CTI Products MCN RCD System Planner - Manual (Page 23)

Section 4. System Installation Options
MCN Comparator Display System Planner Page 19
4.2.3 Spectra-TAC and TAC Comparators and Ericsson Analog Voters
There are 3 general ways to connect to these types of comparators:
1. Male to male 25-pair cable to punch block with field wiring to back of comparator. This option
provides the most flexibility, but it requires a punch block and a place to mount it.
2. Male to blunt end 25-pair cable wired directly to the back of the comparator card cage. This
method eliminates the need for a punch block and works well if the CIB modules and comparators
are mounted close in the same rack so that you can disconnect the cable from the CIB module if
the comparator card cage must be removed.
3. A short 25-pair pigtail cable with a female connector wired directly to the comparator card cage.
A male to male 25-pair cable then connects the CIB to the pigtail. This method eliminates the
need for a punch block, but still allows the comparator card cage to be removed from the rack for
service, especially if the CIB module is mounted in a different equipment rack. Note that the
female pigtail cable is field fabricated.
4.2.4 IIB I/O Modules:
There are two parallel cabling options for IIB modules:
•
Male to Male 25-pair cable and punch block with cross-connect to the comparator interface punch
block(s) for the console module. This is the most flexible option, but it does require extra punch
blocks and mounting space.
•
Male to blunt end 25-pair cable, punched down to the existing punch block(s) for the console I/O
module. This option is less expensive and takes up less space. In the case of the Motorola
Centracom series II consoles, one IIB module can connect to two comparator interfaces in the
CEB. With this option, you will have to split the cable apart and connect to two punch blocks, or
to both sides of a split punch block.
4.3 Network Cabling
MCN modules communicate over a network cable. Specifications for network cabling are the
following:
•
4 pair level IV or V unshielded, 24 AWG, twisted pair cable (EIA/TIA 568B).
•
Maximum of 64 modules can be connected together, with a limit of 20 Comparator I/O Modules
per network segment.
•
Maximum cable length is 4000 feet.
•
Straight through connections.