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PHONE LINE MANAGER 16 X 4
37
12. Central Office Lines:
Advanced Topics
12.1 Tone- or Pulse-Dialing Details
Each outside line can be set in the programming command to be a default tone (DTMF) or rotary (pulse)
dialing type. During speed dialing or redialing, digits will be always be output in the tone mode if the
outside line is set to tone. If the outside line is programmed to dial in the pulse mode, digits will be output
as dial pulses until a star (*) or a pound (#) is encountered. Dialing will then switch to the tone mode. The
initial * or # digit will not be sent to the outside line.
In a simple connection from an extension to an outside line, extensions with ordinary phones are treated
differently than extensions with key phones. An ordinary phone can send either DTMF tones or pulses to
the Phone Line Manager 16 x 4. If the outside line is configured for tone dialing, the DTMF digits from the
phone simply pass through the Phone Line Manager 16 x 4 to the outside line. If the phone sends pulses,
the Phone Line Manager 16 x 4 will receive the entire digit and then output digit pulses onto the outside
line using the pulse mode timing programmed by the System Manager (see Section 19.8). Note that when
an extension invokes the Last Number Redial command, the Phone Line Manager 16 x 4 will output DTMF
tones since the outside line is configured for tone-mode dialing, even if extension originally dialed the
number using pulse dialing.
If the outside line is configured for pulse dialing, the Phone Line Manager 16 x 4 can receive dial pulses
from an ordinary phone and will receive each entire digit and then output digit pulses onto the outside line.
If the phone is sending DTMF digits, the Phone Line Manager 16 x 4 will receive the DTMF digits and send
dial pulses to the outside line. Note that the DTMF tones sent from the phone will be passed through to the
outside line even though the Phone Line Manager 16 x 4 will also send dial pulses. The Phone Line
Manager 16 x 4 will convert the DTMF tones into dial pulses until a * or a # is encountered which will
disable pulses from being sent to the outside line for the duration of the call.
For extensions connected to key phones, each key phone has a TONE/PULSE key which causes a light on
the phone to be lit if the phone is in the pulse mode. In the pulse mode, digits pressed are sent to the Phone
Line Manager 16 x 4 in computer code and the Phone Line Manager 16 x 4 will send the equivalent dial
pulses to the outside line. Thus, unlike with an ordinary phone, DTMF tones are not passed through to the
outside line before the dial pulses are sent. In the tone mode, the phone sends the DTMF tones which are
simply passed through the unit to the outside line. Note that the default dialing mode set for the outside
line only affects speed dialing and redialing operations. If a key phone sends a DTMF tone to an outside line
which is configured to operate in the pulse mode, the Phone Line Manager 16 x 4 will only pass the DTMF
digit dialed and will not send dial pulses. The PAUSE key on the key phone can be pressed during dialing
which will insert a 2-second pause during a subsequent Last Number Redial.