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Strata CTX Configuration
CTX670 Remote Expansion Cabinet
Strata CTX I&M 06/04 2-9
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 fiber-optic pair. One
fiber 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 CO line and
trunk interface PCBs. Network clock synchronization can only be derived from digital trunks
installed in the Base Cabinet (Master) location.
System Capacities
This section contains Strata CTX100 and CTX670 capacities for stations and peripherals, CO
lines, station buttons and system features. All tables apply to both systems unless otherwise noted.
Important! The maximum capacities listed for the CTX100 in Tables 2-3~2-7 are based on an
expanded CTX100 (Base + Expansion cabinet).
Table 2-3 Cabinet and Slot Capacities
Cabinets/Slots/Ports CTX100
CTX670
Basic Processor
BCTU
CTX670
Expanded Processor
BCTU + BEXU
Cabinets
1 or 2 1 to 2 1 to 7
Universal slots
4 or 8 8 or 18 8 to 68
Maximum capacity of ports
(lines + stations)
112 192 672
Table 2-4 Station/Peripherals System Capacities
Stations
CTX100
Base & Expansion
CTX670
Basic Processor
BCTU
CTX670
Expanded Processor
BCTU + BEXU
Add-on modules (DADM3120,
DADM3020) per Base Cabinet
1
30 DKTs with 1 ADM
23 DKTs with 2 ADMs
55 DKTs with 1 ADM
43 DKTs with 2 ADMs
55 DKTs with 1 ADM
43 DKTs with 2 ADMs
Add-on modules (DADM3020) per
Expansion Cabinet
1
31 DKTs with 1 ADM
24 DKTs with 2 ADMs
57 DKTs with 1 ADM
45 DKTs with 2 ADMs
57 DKTs with 1 ADM
45 DKTs with 2 ADMs
CTX Attendant consoles
224
DKT3000- and 2000-series DKTs
1
72/system
(40 Base Cabinet)
(40/Expan. Cab.)
152/system
(72 Base Cabinet)
(80/Expan. Cab.)
552/system
(72 Base Cabinet)
(80/Expan. Cab.)
IPT telephones
64 per cabinet
72 per system
128 Base
160 Expansion
160 System
128 Base
160 Expansion
560 System
IPT telephones with DADM3120
2
26 per cabinet
26 per system
58 per cabinet
58 per system
200 per cabinet
200 per system
Cordless Telephones
(DKT2004-CT, DKT2104-CT,
DKT2204-CT, DKT2304-CT)
1
72 152 552
Door locks
4510
Door phone control boxes (DDCB)
238