sundance-communications.com/forum Forums TDM Business Telephone Systems Samsung Telephones & Systems CO line voltage, off hook, on hook

Basically we've got a Samsung Officeserv 7100 telephone system linked into our main telephone line.

When a call comes in its answered by the auto attendant and transferred through to our main office.

Our problem is...if the caller hangs up before we answer the call, the line isn't disconnecting so the phones keep ringing.

Ive attached a volt meter to the BT master socket (which is also where out system plugs into) to check if disconnect supervision is active on our line and im abit puzzled.

When on hook, the voltage is 48V....fine

When on a call, the voltage is 10V....fine

But when the caller ends the call the line voltage only drops to 7.6V and stays there...once we put the phone down it goes back to 48V

Im sure its suppose to be 48V down to 10V while on a call, when someone puts the phone down the voltage should drop again to 0V then back to 10V to disconnect the call, when we put the phone on hook the voltage goes backup to 48V

Anyone have any ideas?

Ashley your problem would more likely be hook release on your lines in uk its normally 800ms
Get bt or who ever has your lines to check off hook release time

Instruct service provider to set the "Disconnect clear signal" timer to 600 milliseconds