ISDN Interfaces

BPTU Installation

BPTU Loop Back Jumper Plugs

The BPTU PCB provides jumper plugs for loop back testing. Loop back tests are described in “Loop-back Test” on page 7-34. See Table 7-2for switch settings for Loop Back tests.

BPTU Front Panel Indicators

The BPTU PCB provides seven LED indicators to show the status of BPTU: Busy or Idle condition, Alarm status, and Synchronization status.

See Table 7-4for the function of each status LED. Figure 7-3 on page 7-5shows the LED locations.

ISDN Interfaces

Table 7-4 BPTU LED Functions

BPTU LEDs

Indication

FSYNC

Frame Sync error indication. This LED is not mounted.

 

 

 

Multi-frame Sync error indication (same with FSYNC)

MFSYNC

On = No frame synchronization status

 

Off = Frame synchronization status

 

 

 

AIS indication

BALM/AIS

On = BPTU is receiving AIS

 

Off = BPTU is not receiving AIS

 

 

 

RAI indication

YALM/RAI

On = BPTU is receiving RAI

 

Off = BPTU is not receiving RAI

 

 

 

Signaling Loss indication

LOS

On = BPTU is not receiving T1 signals

 

Off = BPTU is receiving T1 signals

 

 

 

Busy state indication

BSY

On = One or more B-channels are in use. Also when BPTU does

not receive far end 1.544 mbs carrier signal, BSY is on steady.

 

 

Off = All B-channels are idle

 

 

 

Primary synchronization indication

PSYNC

On = BPTU is assigned as the secondary timing PCB.

Off = BPTU is not assigned as the CLK timing PCB

 

 

Flashing = BPTU is extracting T1 CLK

 

 

SSYNC

Secondary synchronization indication

Not mounted

 

 

 

Ferrite Core

Install the Ferrite core provided with the BPTU PCB, as shown in Figure 7-7 on page 7-13. This core is needed to comply with FCC requirements.

BPTU Cabling

The BPTU and RPTU PCBs use the same cabling methods. Refer to “BPTU and RPTU Cabling” on page 7-11.

Strata CTX I&M 06/04

7-7

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Toshiba CTX28 manual Bptu Loop Back Jumper Plugs, Bptu Front Panel Indicators, Ferrite Core, Bptu Cabling