LG SINGLE LINE TELEPHONE LKA-200 - Manual (Page 6)

Issue 1 Jan 2006
LKA-200
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6
6.4 DC CHARACTERISTICS
6.4.1 on-hook AC impedance
Required result:
f < 200 Hz : More than 25 kohm
697 < f < 1,633 Hz : More than 80 kohm
f > 3,200 Hz : More than 60 kohm
6.4.2 off-hook AC impedance
Required result: 400 ~ 1,400 ohm
6.4.3 Return Loss
Required result: More than 10 dB through frequency range 200 ~ 3,200 Hz
6.5 CALL ALERTING CHARACTERISTICS
6.5.1 Minimum Ring Start Voltage
Required result: 20 ~ 40 Vrms at 20 Hz (typical 27 Vrms)
6.5.2 Ring sound level
Required result: (at distance 50 cm for ring signal 20 Hz 70 Vrms)
Maximum level : more than 70 dBspl.
6.5.3 Message Waiting Indicator
Required result: Minimum level 70 Vdc for MWI operation.
6.6 RELIABILITY TEST
6.6.1 Temperature test
Required result:
No operation error occurs during each condition;
1) Setup chamber in 0
0
C for 12 hours
2) Setup chamber in 40
0
C at R.H. 85% for 12 hours