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

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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.

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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