Expansion Cabinets; Ctx670 Remote Expansion Cabinet - Toshiba Strara CTX Series Installation And Maintenance Manual

Expansion Cabinets

One to six Expansion Cabinets can be added to increase the system station and Exchange line capacity.
Each expansion cabinet provides 10 slots (S_01~S_10).
Refer to the following section for cabinet slot and station/line capacities.
number of stations and Exchange lines allowed when additional cabinets and PCBs are used.
CABINET NO.
2 3 4 5 6 7
S_01 S_02 S_03 S_04 S_05
S_06 S_07 S_08 S_09 S_10
S_01 S_02
Figure 1-4 Strata CTX670 Expansion Cabinet Interior

CTX670 Remote Expansion Cabinet

A CTX670 Expansion Cabinet can be located up to three kilometers from its Base Cabinet. Remote
Expansion Cabinets are enabled by the RRCU PCB. One RRCU connects to up to two ribbon-type
Data Cables and applies the inter-cabinet signal to a multi-mode fibre-optic pair. One fibre pair can
support one or two expansion cabinets in one remote location using one RRCU in the Base Cabinet
and another in the Remote Expansion Cabinet.
The CTX670 Base Cabinet supports up to six Remote Expansion Cabinets (at least one RRCU PCB is
required for each remote location).
Remote cabinets support the BIOU for external Page Zones, Night Bell, etc., and all Exchange line and
trunk interface PCBs. Network clock synchronisation can only be derived from digital trunks installed
in the Base Cabinet (Master) location.
Strata CTX I&M September 2002
S_03 S_04 S_05 S_06 S_07
Figure 1-4 shows an Expansion Cabinet.
S_08 S_09 S_10
Strata CTX Configuration
Tables 1-5 and 1-6 show the
DC OUT
DC OUT
-27V1
-27V1
-27V2
-27V2 AC IN
BATT
+
+
-27V3
-27V3
-
-
-27V4
-27V4
POW
POW
+5V AC IN
+5V
AC IN
-5V
-5V
P.F.
P.F.
POWER
RESET
POWER
RESET
ON
ON
EXP
EXP
BASE
BASE
OFF
FG OFF
FG
5002
5002
5003
1-9