RBSU/RBSS

NT-Mode

TR

490'

ISDN Telephone

RJ45

TE-1 PC Card

TR

ISDN Interfaces

RBUU/RBUS Interface Unit

ISDN Interfaces

5438

640'

Figure 7-22 Short Passive Bus

RBUU/RBUS Interface Unit

Circuits per PCB: 2 circuits (2B + D each circuit)

Interfaces with: ISDN BRI U when connected to the Public Network or a BRI U-type TE-1 or TA devices when connecting to ISDN station equipment

Older Version(s): none

The Strata CTX RBUU/RBUS interface unit (Figures 7-23and 7-24) supports ISDN BRI U-type TE1 or TA devices.

LEDs on the RBUU/RBUS show a continuous status of operation. Refer to Table 7-12for a list of each LED’s status.

Figure 7-25shows the location of the LEDs and connectors.

RBUU Installation

Before you can begin installation of the RBUU, you may have to install the subassemblies.

To install the subassemblies (RBUS)

Place the RBUS card (component side facing down) onto the RBUU connectors. Apply firm, even pressure to ensure proper seating of the connectors. The RBUS card should have been installed at the factory.

To install an RBUU PCB

1.Insert the RBUU (component side facing right) into the appropriate expansion unit slot and apply firm, even pressure to ensure proper seating of connectors.

2.After installing the RBUU, gently pull the PCB outward. If the connectors are properly seated, a slight resistance is felt.

Strata CTX I&M 06/04

7-27

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Image 293
Toshiba CTX28 manual RBUU/RBUS Interface Unit, Rbuu Installation, To install the subassemblies Rbus, To install an Rbuu PCB