Electrical characteristics:
Rated power: DC 12V, 1A
Contact resistance: measurement shall be made at with small current 1,000Hz (1A Max.)
Insulation resistance: a voltage of 500V DC shall be applied for 1 minute after which measurement shall be made
Dielectric strength: 500V AC (50 to 60Hz) for 1 minute, trip current: 2mA
Endurance characteristics: 
Soldering heat test: the terminal for a printed circuit board:
Temperature of solder: 260 +/-degree
Dip time: 5 +/-1 seconds
The terminal for a lead wire: 
Temperature of solder: 350 +/-10 deg.
Dip time: 3 +/-1 seconds
Cold: the jack shall be stored for 96 hours at a temperature of -25 +/-3 deg. immediately after which measurement shall be made 
Dry heat: the jack shall be stored for 96 hours at a temperature of 70 +/-2 deg. immediately after which measurement shall be made
Contact resistance: 50m Ohms Max.
Insulation resistance: 50m Ohms Min.
Contact pressure: 0.5N (50gf) Min.
Insertion force: 3 to 30N (0.3 to 3.0Kgf)
Withdrawal force: 3 to 30N (0.3 to 3.0Kgf)

Phone Jack, with Maximum Contact Resistance of 50m Ohms