JPH0273852U - - Google Patents

Info

Publication number

JPH0273852U

JPH0273852U JP15311388U JP15311388U JPH0273852U JP H0273852 U JPH0273852 U JP H0273852U JP 15311388 U JP15311388 U JP 15311388U JP 15311388 U JP15311388 U JP 15311388U JP H0273852 U JPH0273852 U JP H0273852U

Authority

JP

Japan

Prior art keywords

telephone

sends out

hook state

call

detection signal

Prior art date

1988-11-24

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 238000001514 detection method Methods 0.000 claims description 5
• 238000010586 diagram Methods 0.000 description 1

Cited By (1)