DSTS2 with DSP
OPERATING INSTRUCTIONS
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MONITOR MODE
Monitor
The high impedance monitor allows observation of the line for service
quality or availability. There will be no perceptible click or reduction
of level to callers when it is connected. Monitor is safe on digital and
data circuits but be careful with digital signals - they may not be au-
dible.
Sounder
The sounder will warble in Monitor mode when there is an incoming
call and it will chirp if connected across a line with live Pulse dialling.
It will also buzz continuously if an attempt is made to go off hook on
a high voltage digital service,
see the section on DSP.
Polarity test
The polarity test may be conducted on a line after monitoring to en-
sure the line is free. Do not test polarity during live calls - it will cause
loud clicks. Connect to line, press the polarity button and observe the
polarity window at the centre of the keypad.
If you are using an accessory cord-set:
Red LED = Red wire connected to positive.*
Green LED = Red wire connected to negative.
* UK plug: pin 2 positive, pin 5 negative.
* RJ11 plug: pin 4 positive, pin 3 negative.
WARNING:
Do not conduct the polarity test in the presence of AC power. Dam-
age to the unit will result.
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2
TALK MODE
Dialling
Select dialling mode via the TONE/PULSE switch.
Connect to line and monitor to ensure the line is free, then switch to
TALK. Check for dial-tone.
It is possible to switch from PULSE to TONE at any time (but not from
Tone to Pulse).
Redial
Switch TALK to MONITOR to TALK, then press LNR. Digits are re-
dialled in the dialling mode they were entered previously.
After disconnection from the line, the LNR memory is kept for >5 min-
utes.
Timed-Break-Recall
For register recall. Press the TBR button to give a line-current break.
Mute
It is possible to cut-off transmission by muting the microphone.
Pressing the MUTE button will offer privacy or will reduce sidetone in
noisy environments. Release the button to talk.
Ground-start operation
DSTS2 may be used on ground-start (or earth- calling) lines. Con-
nect a ground to the green wire of the line-cord (pin 3 of the BT UK
plug - if fitted and pin 5 of RJ11 - if fitted). Switch the DSTS2 to TALK
then press and release the G/S button.
CORD SETS
A range of alternative cord sets for the DSTS2 are available. In addi-
tion we can also supply modular adaptors (break-out connectors) to
suit many types of modular and frame jack sockets. Please contact
your nearest supplier for further details.
BELT CLIP/HANGING LOOP
Rotate the clip to use as a
hanging loop.
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3
DSP ALARM & OVERVOLTAGE PROTECTION
DSP (Digital Services Protection) fully protects the phone against the
high voltages associated with many digital services. In addition the
phone is protected against connection to mains AC power circuits.
If an attempt is made to go off hook (TALK mode) on a circuit with a
potential of more than 115V ± 5Vdc the DSP alarm will sound (a con-
tinuous buzzing tone is emitted). The line is not looped and the inter-
nal circuitry is protected.
If the phone is accidentally connected to AC mains in MONITOR
mode (on-hook) the phone will ring continuously.
If in TALK mode the line will not be looped and the DSP alarm will be
emitted.
In either case disconnect immediately !
WARRANTY
Tempo Europe Ltd warrants this product and each part thereof for a
period of one year. Warranty covers all defects of manufacture and
materials.
Tempo Europe Ltd. agrees to remedy warranty defects free of charge
provided that: the product is returned pre-paid to the supplier, it is ad-
equately packed and labeled, all parts are returned and warranty
seals (if fitted) are not broken.
Warranty does not cover normal wear and tear, accidental damage,
misuse, abuse or neglect and is voided by any unapproved modifica-
tion.
REPAIR
Contact your supplier or Tempo Europe Ltd. for advice.
Return all parts - missing parts will be replaced and charged for.
Clearly describe your fault and enclose details. Repairs within the
warranty period will be repaired free of charge.
Include your name, return address, telephone and fax numbers.
Pack in a strong secure box and despatch by a recorded and insured
delivery service.
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4
Distributor
Tempo Europe Ltd.
Unit 3,
Maesglas Industrial Estate,
Newport
NP20 2NN
United Kingdom.
Tel: +44 (0) 1633 223552
Fax: +44 (0) 1633 223948
e-mail: [email protected]
DSTS2 with DSP Operating instructions Issue 1, 8/02, 1201-03-2421
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