Telephone Systems General Description

Universal Slot PCBs
Station, Line and Option PCBs
20 Strata CTX General Description 11/02
ISDN Primary Rate Interface Unit (RPTU2)
Provides (1~8B + D), (1~16B + D), or (1~23B + D)
channels (lines), depends on system programming.
RPTU2 is required for QSIG Networking.
Interface Options:
ISDN PRI
POTS
FX
Tie (senderized)
Tie (cut through)
OUTWATS (intra-LATA)
OUTWATS (inter-LATA)
InWATS
QSIG
Loop Start CO Line Interface Unit (RCOU)
Provides four CO analog loop start line circuits.
With RCOS, provides eight CO analog loop start line
circuits.
Interface Options:
CO analog loop start lines
Loop Start CO Line Interface Subassembly (RCOS)
Provides four additional Loop Start CO lines. One
RCOS subassembly per RCOU.
Same as RCOU.
T1/DS-1 Interface Unit (RDTU2)
Provides T1 (DS1) Interface: 1~8, 1~16, or 1~24
channels (lines), depends on system programming.
Interface Options:
T1
Loop start lines
Ground start lines
Tie lines (wink or immediate)
DID/DOD lines (wink or immediate)
Remote Expansion Cabinet Unit (RRCU)
Supports two CTX670 remote cabinets. 62.5 mµ, multi-
mode fiber.
Remote cabinet not supported by main system reserve
power.
Tie Line Unit (REMU2)
Provides four analog Tie line circuits. Interface Options:
E&M Tie lines
Two- or four-wire transmission
Type I signaling
Type II signaling
Immediate start
Wink start
Table 16 Option PCBs
Option Interface Unit (BIOU) Interface Options:
Provides Paging output (600 ohm and three-watt amp),
four zone paging relays, three MOH interfaces and four
control relays (Night Transfer and BGM mute).
Table 15 CO Line PCBs (continued)