ISDN Interfaces
10-10
Strata CT I&M Manual October 2000
Figure 10-5
RBSU/RBSS Interfaces between the S/T Reference Points
Capacity and Cabinet Slot Information
The RBSU/RBSS can be installed in any Strata CT slot except the programming telephone
PDKU or PEKU slot. On Strata CT, each RBSU contains two circuits and each circuit
reduces the system capacity by two station ports
and
two Exchange lines (one port/line per
B-channel). Therefore, if the RBSU PCB is installed, the station port and Exchange line
count will increment by four ports and four lines at the RBSU cabinet slot.
If the RBSU/RBSS is installed in a Strata CT slot, the station port and Exchange line count
will increment by eight station ports and eight lines at the RBSU/RBSS cabinet slot. RBSU
and RBSS PCBs can be installed in any combination so long as the number of RBSU PCBs is
the same or greater than the number of RBSS PCBs.
PS-1 Line Power Option
The RBSU provides an optional line power supply, R40S1A, that will supply line power to
TE devices. This power option only applies to RBSU or RBSS circuits that are configured in
the NT mode. See
to install the R40S1A.
Each of the four circuits on RBSU/RBSS can be connected to share the R40S1A using option
switches on the PCBs (see
). Before using the R40S1A as a line power source,
make sure the TE devices do not require more power than the R40S1A can supply and the TE
is compatible with the ISDN PS-1 power arrangement.
shows the power limits of
the R40S1A.
RX
TX
RBSU/RBSS
NT1
RX/TX
U
T
S
BRI
(2-wire)
BRI-TE
(4-wire)
BRI-NT
(4-wire)
RBSU ST ref points
S, T, and U are ISDN reference points.
TE = S-type Terminal Equipment
TA = S-type Terminal Adaptor
TE1
or
TA
1
8
. .
.
TE1
or
TA
ISDN
H
C
Summary of Contents for Strata CT
Page 36: ...Strata CT Configuration 1 22 Strata CT I M Manual October 2000 H C ...
Page 94: ...Strata CT Installation 2 58 Strata CT I M Manual October 2000 H C ...
Page 242: ...Peripheral Installation 6 54 Strata CT I M Manual October 2000 H C ...
Page 258: ...ACD Installation 7 16 Strata CT I M Manual October 2000 H C ...
Page 274: ...Fault Finding 8 16 Strata CT I M Manual October 2000 H C ...
Page 364: ...ISDN Interfaces 10 38 Strata CT I M Manual October 2000 H C ...
Page 370: ...Notes to Users A 6 Strata CT I M Manual October 2000 H C ...