UX-P115U
5 – 10
5. CI detection circuit
• CI is detected by the photo coupler which is integrated in series in
the primary side TEL circuit well proven in the existing unit.
6. Signal/DTMF transmission level & receiving level
• Signal transmission level setting: ATT -8 dB Circuit output: -11
dBm.
• DTMF transmission level setting: HF -2.5 dBm LF -4.5 dBm
Thus, set the level.
1.4. Signal selection
The following signals are used to control the transmission line of TEL/
FAX signal. For details, refer to the signal selector matrix table.
[Control signals from output port]
Signal Name Description
CML
(The circuit is
located in the
TEL/LIU PWB.)
Line connecting relay and DP generating relay
H: Line make
L: Line break
SP MUTE
(The circuit is
located in the
TEL/LIU PWB.)
Speaker tone mute control signal
H: Muting (Power down mode)
L: Muting cancel (Normal operation)
TELMUTE Handset reception mute control signal
H: Muting
L: Muting cancel
RCVOL
DTMFMUTE
(The circuit is
located in the
control PWB.)
Handset receiver volume control signal
Note: The DTMF sending listed above is DTMF
signal sending in the handset OFF-HOOK mode.
VOLUME SETTING LINEOUT A RCVOL DTMF
MUTE
(HIGH) (LOW)
Receiver volume
setting
Low 1 1
High 0 0
Middle 1 0
DTMF Transmis-
sion volume setting
(Receiver)
Fixed 1 1
Key buzzer volume
setting
Speaker volume
setting
Low 1 1
Middle 1 0
High 0 1
Ringer volume set-
ting
Low 1 1
Middle 1 0
High 0 1
DTMF speaker vol-
ume setting
Low 1 1
Middle 1 0
High 0 1
Volume High Middle Low
DTMF sending
RCVOL
LH
DTMFMUTE L H
H
H
LH
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