1-10 System Outline
1.5 Specifications
SMDR (Station Message Detail Recording)
Interface EIA (RS-232C)
Output Equipment Printer
Detail Recording Date, Time, Extension Number, CO
Line Number, Dialled Number, Call
Duration, Account Code
1.5.2 Characteristics
Station Loop Limit KX-T7220 / KX-T7230 / KX-T7235 / KX-T7250.............40 ohms
Single Line Telephone .............................600 ohms including set
Doorphone................................................20 ohms
Minimum Leakage Resistance 15 000 ohms
Maximum Number of Station Instruments per Line
1 for KX-T7220, KX-T7230, KX-T7235,
KX-T7250 or single line telephone
2 by Parallel or eXtra Device Port Connection of a
proprietary telephone and a single line telephone
Ring Voltage 70 Vrms at 25 Hz depending on the Ringing Load
Primary Power 240 VAC, 50 Hz
Central Office Loop Limit 1 600 ohms max.
Environmental Requirements 0 – 40 °C / 32 – 104 °F, 10 – 90%
Extension Connection Cable
Single line telephones
KX-T7220, KX-T7230, KX-T7235,
KX-T7250
KX-T7240
1 pair wire (A, B)
2 pair wire (L, H): A and B are not necessary or
2 pair wire (A, B, L, H)
2 pair wire (L, H): A and B are not necessary
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