Toshiba Strata CT, Installation & Maintenance Manual

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ISDN Interfaces
Strata CT I&M Manual October 2000
10-19
Figure 10-12 RBSU to NT Point-to-point Connection
Connecting RBSU/RBSS Station Devices (NT-Mode)
S-type TAs and TE-1s 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
Table 10-5 on Page 10-13 and Program
*60).
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
conference board) that is designed to plug directly into the ISDN (S/T) interface without the
use of a TA.
RBSU
TE-Circuit
Switch in
100-ohm TR
using RBSU
option switch.
RJ45 Pinout
(RBSU - BRI jack)
3343
Network
BRI-line
RJ-11 Jack
NT
Switch
in 100-ohm
TR.
T and U are ISDN standard
reference points. Note:
BRI
(four-wire)
T
BRI
(two-wire)
U
Demarcation Point
3
6
4
5
3
6
4
5
RX
RX
TX
RX TX
TX
RX TX
RX/TX
RX/TX 4
5
RJ45 Pinout
(NT - S/T jack)
Local AC
Power
H
C