Isdn U-Type Basic Rate Interface Unit (Rbuu) (Dk424 Only); Enhanced 911 Cama Trunk Interface Unit (Rmcu/Rcms) (Dk424 Only); Summary Of Pcbs And Subassemblies - Toshiba Strata DK14 General Description Manual

Universal Slot PCBs

Summary of PCBs and Subassemblies

ISDN U-type Basic Rate Interface Unit (RBUU) (DK424 only)

The Basic Rate Interface Unit provides two Basic Rate Interface (BRI) "U" circuits. Each circuit
provides two simultaneous voice and/or data connections with a single interface. BRI uses the
2B+D transmission format which is defined as two 64-kbps bearer channels and one 16-kbps data
(control) channel.
Note RBUU/RBUS will be available with Release 4.2.
Basic Rate Interface Subassembly (RBUS)
The RBUS attaches to the RBUU to provide two additional BRI "U" circuits that can be used to
connect to Network BRI lines and/or station-side connections only. An RBUU with the RBUS
subassembly provides four BRI "U" circuits in one card slot.
RBUU/RBUS stations can be voice and/or data devices, such as ISDN telephones and Terminal
Adapters, that support the standard U-type interface. Each RBUU/RBUS circuit provides two B
channels plus one D channel and reduces the basic system capacity by two CO lines and two
station ports. See

Enhanced 911 CAMA Trunk Interface Unit (RMCU/RCMS) (DK424 only)

The RMCU/RMCS PCBs provide up to four CAMA trunk circuits. The RMCU/RMCS eliminates
the need for connection of adjunct terminal adapter equipment to E911 CAMA trunks. Available
for DK424 in Release 4.0. Also, see note below RCMS.
CAMA Trunk Subassembly (RCMS)
One RCMS subassembly attaches to the RMCU to provide two CAMA trunk circuits. A second
RCMS can be added to provide four CAMA trunk circuits. Available in a future release.
The RCMS is ordered separately from the RMCU, but it must be installed on the RMCU
Note
to provide CAMA trunk interface.
Summary of PCBs and Subassemblies
Table 23
Table 23 PCB Circuits, Interface Options and Connectors
PCB Subassembly
RPTU
RBSU
attaches to
RBSS
RBSU
40
"ISDN Basic Rate Interface (BRI)" on Page 73
provides a summary of the universal slot PCBs and available subassemblies.
Circuits
(DK424 only)
1 circuit/ISDN PRI
(23 B channels/1 D channel)
2 ISDN BRI S/T point circuits (NT
or TE). Each circuit is 2B+1D.
(Host for the RBSS)
2 ISDN BRI, S point circuits (2B+D
each)
for more information.
Interface Options
POTS
FX
Tie (senderized)
Tie (cut through)
OUTWATS (intra-LATA)
OUTWATS (inter-LATA)
InWATS
Network and/or station side
Station side only
1 RBSS subassembly per RBSU
Strata DK General Description
Connector
RJ48C or RJ48X
ISDN TIA-568A
RJ45, ISDN TIA-568A
RJ45, ISDN TIA-568A
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