• Accommodated lines: a total of 22 lines(station line 2, magneto type 8, common battery type 12)
• Distance range: common battery type 4 Km, magneto type 32Km
• Signaling method: common battery type(tone transmission), magneto type(20Hz paging signal transmission)
• Power used: AC 220V, DC 24V, storage batteries can also be used
• Environmental condition:
- Main telephone, interphone: satisfy standards for commercial standard telephone sets
- RD telephone set: satisfies MIL-STD-810F |