Connecting Rbsu/Rbss Station Devices (Nt-Mode) - Toshiba strata CT Installation & Maintenance Manual
Digital business telephone system
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Figure 10-12 RBSU to NT Point-to-point Connection
H
Connecting RBSU/RBSS Station Devices (NT-Mode)
C
Strata CT I&M Manual October 2000
RJ45 Pinout
(RBSU - BRI jack)
3
RBSU
TE-Circuit
6
Switch in
100-ohm TR
4
using RBSU
option switch.
5
Note:
T and U are ISDN standard
reference points.
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
*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.
RJ45 Pinout
(NT - S/T jack)
BRI
(four-wire)
3
TX
RX
6
TX
RX
RX
TX
4
RX
TX
5
T
Table 10-5 on Page 10-13
BRI
(two-wire)
4
RX/TX
NT
Network
Switch
BRI-line
5
RX/TX
in 100-ohm
RJ-11 Jack
TR.
U
Demarcation Point
Local AC
Power
and Program
ISDN Interfaces
3343
10-19
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