Capacity And Cabinet Slot Information - Toshiba Strata DK40 Installation & Maintenance Manual

DK40 Installation
3030
TE
8
or
TA
1
TE
or
TA
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
2-8.
Table 2-8 TBSU, BRI-TE, and BRI-NT Maximums by Type of Processor
TBSU Circuit
Configuration
Circuit 1 - TE
Circuit 2 - TE
Circuit 1 - TE
Circuit 2 - NT
Circuit 1 - NT
Circuit 2 - TE
Circuit 1 - NT
Circuit 2 - NT
* TBSU circuits can be NT or TE.
2-36
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
BRI-NT
(4-wire)
RX
DK40
TBSU
TX
S
S, T, and U are ISDN reference points.
TE = S-type Terminal Equipment
TA = S-type Terminal Adaptor
System Port Usage
2 Exchange Lines
2 Exchange Lines
2 Exchange Lines
2 Station Ports
2 Station Ports
2 Exchange Lines
2 Station Ports
2 Station Ports
TBSU Two-circuit ISDN BRI Interface Unit
BRI-TE
(4-wire)
RX
NT1
TX
T
Station Numbering
N/A
N/A
N/A
18 ~ 19
18 ~ 19
N/A
18 ~ 19
20 ~ 21
Strata DK40 I&M Manual Spring 1999
BRI
(2-wire)
ISDN
RX/TX
U
Exchange Line
Numbering
Lines 1 ~ 2
Lines 3 ~ 4
Lines 1 ~ 2
N/A
N/A
Lines 1 ~ 2
N/A
N/A
Table