Chapter 10 - Isdn Interfaces; Pri Overview; Bri S/T Overview - Toshiba strata CT Installation & Maintenance Manual

ISDN Interfaces

PRI Overview

H

BRI S/T Overview

C
Strata CT I&M Manual October 2000
This chapter covers information on the ISDN Primary Rate Interface (PRI) and Basic Rate
Interfaces (BRI).
N
For PRI services, the Strata CT uses an RPTU PCB to connect to the Public Switched
Telephone Network (PSTN). Each RPTU provides 30 B channels. The RPTU PCB is
shown in Figure 10-1
N
For BRI S/T services, the Strata CT uses an RBSU PCB. The RBSU provides two BRI
S/T circuits to connect to the PSTN BRI NT. On the station-side it can connect to:
N
S-type ISDN telephones and terminal equipment
N
S-type terminal adapters
Each device can support voice and/or RS-232 switched-circuit data. The station-side
BRI S/T circuits are point-to-multipoint.
A subassembly (RBSS) can be attached to the RBSU for two additional BRIs for NT-
type station-side connections only. The RBSU PCB and the RBSS subassembly are
shown in Figure 10-7 on Page 10-12
combination of RBSU and RBSS uses only one slot to provide up to four NT or 2 TE
ccts. The RBSS does not support TE operation.
Note In Strata CT, each installed RBSU circuit provides a 2B + D connection and uses a
system capacity of two station ports and two Exchange lines regardless of the circuit
application.
Note
The installation of an RBSS increases this usage by 2 station ports but does not
increase the usage of any exchange line ports.
on Page 10-5.
and Figure 10-8
ISDN Interfaces
10
on Page 10-13 respectively. The
10-1