Power Failure Emergency Transfer (Dpft) Installation - Toshiba Strara CTX Series Installation And Maintenance Manual

Peripheral Installation

Power Failure Emergency Transfer (DPFT) Installation

1. Mount the DPFT on or near the MDF.
See Chapter 6 – MDF PCB
Note
2. Using 25-pair cables with amphenol-type connectors (female for DPFT connector J1, male for
DPFT connector J2), connect the DPFT to two 237 Krone strips.
3. Connect the Exchange lines selected for emergency use to the DPFT J1-block "PSTNA" and
"PSTNA-B" terminals.
4. Connect the PCOU/RCOU/RCOS circuits related to the emergency Exchange lines to the DPFT
J1-block "PCOU/RCOU/RCOS-A" and "PCOU/RCOU/RCOS-B" terminals.
5. Connect the standard telephone stations selected for emergency use to the DPFT J2-block "TEL-
A" and "TEL-B" terminals.
6. Connect the RSTU or PSTU standard telephone circuits related to the emergency standard
telephones to DPFT J2-block "PSTU-A" and "PSTU-B" terminals.
7. Connect the DPFT to the RSTU/PSTU DG and -24V terminals (See
Wiring for RSTU/PSTU and PCOU/RCOU/RCOS wiring/interconnecting details). The -24V (Pin
25) and DG (Pin 50) ground terminals are available on the RSTU or PSTU only.
To test the operation of the DPFT
1. Turn the system power switch Off.
2. Verify that Exchange dial tone is available at each standard telephone connected to the DPFT.
3. Call back to each telephone using an outside line.
8-28
Wiring, DPFT/MDF interconnecting tables.
Chapter 6 – MDF PCB
Strata CTX I&M September 2002