Connecting Rbsu To Network Side (Te-Mode); Connecting Rbsu/Rbss Station Devices (Nt-Mode) - Toshiba Strata DK40 Installation & Maintenance Manual

DK40 Universal Slot PCBs

Connecting RBSU to Network Side (TE-Mode)

The RBSU only, not the RBSS, circuits can be connected to the network side of a BRI line.
The RBSU circuit must be configured in the TE-mode (refer to option switches in
on Page 3-50
The connection between the NT1 and the RBSU TE circuit is a point-to-point connection, so
the NT1 can connect to only one RBSU BRI TE circuit.
A 100-ohm Terminating Resistor (TR) is required on each end of the point-to-point
connection. The TR must be switched into the RBSU TE circuit (refer to option switches in
Table 3-14 on Page
Pinout (RBSU - BRI Jack)
RBSU
TE-Circuit
Switch in
100-ohm TR
using RBSU
option switch.
Note: T is an ISDN standard
reference point.
Figure 3-31 RBSU to NT1 Point-to-point Connection

Connecting RBSU/RBSS Station Devices (NT-Mode)

S-type TAs and TEs can be connected to the station side of RBSU and RBSS circuits. TA and
TE devices must be powered by local AC power using AC adapter supplied with the TA or TE
device. The RBSU/RBSS circuits must be configured in the NT mode when connected to TA
and TE devices (refer to option switches in
Strata DK40 Programming Manual).
The TA enables you to connect non-ISDN voice and data devices to ISDN BRI circuits. The
TA matches the protocol of existing interfaces (R-reference point) to the ISDN S/T protocol.
TA devices include asynchronous circuit-switched adapters that convert RS-232 async data
(like data from a PC COM port) to B-channel 64 kbps sync.
TAs also enable you to connect standard telephones and non-ISDN fax machines to receive
and make calls over ISDN circuits. TEs include any user device (telephone, fax, PC video
3-58
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
and Program *60 in the Strata DK40 Programming Manual).
3-50) and into the NT1 device.
RJ-45
Pinout (NT1 - S/T Jack)
BRI
(Four-wire)
3
6
TX
4
5 RX
T
Demarcation Point
RBSU/RBSS ISDN Basic Rate Interface Unit
RJ-45
3
6 NT-1
RX
Switch
in 100-ohm
4
TR.
TX 5
Table 3-14 on Page 3-50
BRI
(Two-wire)
4
5 RX/TX
and Program *60 in the
Strata DK40 I&M Manual Spring 1999
Table 3-14
Network
BRI-line
Jack
3040