Instruction manual

FEATURES AND SERVICES
Touch-Tone and Dial Pulse Services
Description
All touch-tone single-line voice terminals and MET sets are equipped with dial pads that
generate Dual Tone Multifrequency (DTMF) signals when a dial button is pressed. Model
500 Series single-line terminals have rotary dials that generate dial pulses corresponding to
the numbers selected. The 7300H series (MERLIN) voice terminals are equipped with touch
dial pads that generate digitally coded signals when a dial button is pressed.
Each trunk may be independently arranged for either touch-tone or dial pulse service.
Touch-Tone Dial Pads
On outgoing calls on trunks requiring touch-tone signals, cut-through-dialing is provided.
Where the trunk requires dial pulse signals, conversion of the touch-tone signals to dial
pulses is provided until an end of dialing signal is detected. Cut-through is then provided,
and all subsequent digits are sent as touch-tone signals. See the “End-to-End Signaling”
feature description for more information.
Rotary Dials
Voice terminals with rotary dials are required for Power Failure Transfer stations when the
system connects to the CO by way of dial pulse trunks. They are not recommended for
other applications.
Touch Dial Pads
For outgoing calls on trunks requiring touch-tone signals, all dialed digits are converted to
touch-tone signals.
If the trunk requires dial pulse signals, the dialed digits are converted to
dial pulses until an end of dialing signal is detected.
Cut-through is then provided, and all
subsequent digits are converted to touch-tone signals. See the “End-to-End Signaling”
feature description for more information.
Administration Requirements
Trunk Port:
● Assign trunk Class of Service (COS).
COS includes touch-tone/dial pulse
specification.
2-340