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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
Chesilvale Electronics Ltd warrants this product and each part there-
of for a period of one year. Warranty covers all defects of manufac-
ture and materials.
Chesilvale Electronics agrees to remedy warranty defects free of
charge provided that: the product is returned pre-paid to the supplier,
it is adequately packed and labeled, all parts are returned and war-
ranty 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 Chesilvale 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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