Toshiba DP120F Service Manual page 378

• I/OP-1 GA Signal Table
No. Signal Name
30 ATT3DB2
31 ERCL2
32 LD2
33 CML2
35 OCI1
36 OREVB1
37 OREVA1
38 OHOOK1
39 EXTHOOK1
40 HSER5
43 MONISEL
44 TONESEL
45, 47, 48 HLEA3-5
49 CML1
50 LD1
53 ERCL1
54 ATT3DB1
I: Input O: Output
March 2000 © TOSHIBA TEC
(2/3)
Type
O Line 2 attenuator control signal (H: ATT3dB inserted)
Connects the attenuator to line 2 to attenuate the
reception level by 3dB.
- Unused
O Line 2 dial pulse generate signal (H: Dial make)
Causes line 2 to generate dial pulses.
O Line 2 CML relay control signal
(H: MODEM, L: External telephone)
Controls the CML relay of line 2 to switch the line
path.
I Line 1 CI detect signal (H: Undetected, L: Detected)
Detects the ring signal sent from line 1.
I Line 1 current reverse current detect signal
Detects the reversed current which flows through line
1.
I Line 1 current detect signal
Detects the current which flows through line 1.
I Hook detect signal (H: On-hook, L: Off-hook)
Detects the hook status of the handset (Option for
US/CA models only).
- Unused
- Signal ground
O Line monitoring select signal (H: Line 1, L: Line 2)
Switches the signal to be monitored.
O Line/tone select signal (H: Line, L: Tone)
Switches the signal to be monitored.
- Unused
O Line 1 CML relay control signal
(H: MODEM, L: External telephone)
Controls the CML relay of line 1 to switch the line
path.
O Line 1 dial pulse generate signal (H: Dial make)
Causes line 1 to generate dial pulses.
- Unused
O Line 1 attenuator control signal (H: ATT3dB inserted)
Connects the attenuator to line 1 to attenuate the
reception level by 3dB.
I/O: Bidirectional
Functions
7-69 DP120F/DP125F Circuit Description