Rptu Interface Unit; Rptu Overview; Strata Ct Slot Assignments - Toshiba strata CT Installation & Maintenance Manual

RPTU Interface Unit

System:
Circuits per PCB:
Interfaces with:
Older Version(s):

RPTU Overview

H
C

Strata CT Slot Assignments

Strata CT I&M Manual October 2000
Strata CT
30 B channels
ISDN PRI
none
The Strata CT system supports the RPTU according to the common control unit resident
within the system.
The RPTU's LEDs indicate a continuous status of its operation. They are shown in
Figure 10-2. Table 10-4 on Page 10-6
The RPTU provides 30 B channels and 1 D channel. Each RPTU can also use its own
D-channel for control.
The RPTU's in-service bit rate is 2.048 mbps (± 4.6 ppm), but during a maintenance session,
the rate may vary ± 32 ppm.
Extracting the LAYER-1 clock from the ISDN PRI service provider is the most common
method used to synchronise the RPTU PCB and the CT time switch to the public switched
telephone network. One RPTU or RBSU, must extract the clock from the ISDN provider.
The selected unit is designated as the "Primary" timing source in system Program *42-1. In
remote cabinet applications, the Primary clock source PCB must be installed in the Base
Cabinet (main location). For more information, refer to
Page 10-22.
Up to seven RPTU PCBs can be installed in a Strata CT system providing up to 200 PRI lines
(B-channels). If RPTU (PRI) PCBs are installed in the same Strata CT, the maximum
combined PCBs cannot exceed the numbers provided in
placed in designated slots in each of the Strata CT cabinets. The next highest slot adjacent to
the RPTU slot must be vacant.
Program 03 defines which cabinet slots contain RPTU PCBs. The maximum number of cards
and lines is listed in Table
lists the functions for each LED.
10-2.
ISDN Interfaces
"Timing and Synchronisation"
Table 10-1. The PCBs must be
on
10-3