Toshiba Strata DK40 - Capacity and Cabinet Slot Information

DK40 Installation TBSU Two-circuit ISDN BRI Interface Unit
2-36
Strata DK40 I&M Manual Spring 1999
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
Figure 2-20 TBSU Interfaces between the S/T Reference Points
Capacity and Cabinet Slot Information
The TBSU can only be installed in the Base KSU. Each TBSU contains two circuits and each
circuit reduces the system capacity by two station ports or two exchange lines (one port/line
per B-channel). Therefore, if the TBSU PCB is installed, and configured for TE mode, the
exchange line count will increment by four lines. If the TBSU is installed for NT mode, the
station count will increment by four stations.
A maximum of one TBSU PCB can be installed in the DK40 system. The TBSU circuit
configuration options and system station and line usage/system numbering is shown in Tab le
2-8.
* TBSU circuits can be NT or TE.
Table 2-8 TBSU, BRI-TE, and BRI-NT Maximums by Type of Processor
TBSU Circuit
Configuration
System Port Usage Station Numbering
Exchange Line
Numbering
Circuit 1 - TE
Circuit 2 - TE
2 Exchange Lines
2 Exchange Lines
N/A
N/A
Lines 1 ~ 2
Lines 3 ~ 4
Circuit 1 - TE
Circuit 2 - NT
2 Exchange Lines
2 Station Ports
N/A
18 ~ 19
Lines 1 ~ 2
N/A
Circuit 1 - NT
Circuit 2 - TE
2 Station Ports
2 Exchange Lines
18 ~ 19
N/A
N/A
Lines 1 ~ 2
Circuit 1 - NT
Circuit 2 - NT
2 Station Ports
2 Station Ports
18 ~ 19
20 ~ 21
N/A
N/A
RX
TX
DK40
TBSU
NT1
RX
TX
ISDN
RX/TX
UTS
BRI
(2-wire)
BRI-TE
(4-wire)
BRI-NT
(4-wire)
3030
S, T, and U are ISDN reference points.
TE = S-type Terminal Equipment
TA = S-type Terminal Adaptor
TE
or
TA
1
8
...
TE
or
TA