Toshiba DP120F, Руководство по обслуживанию

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