DND causing line to go busy when on call for new incoming callers

Say What?

Check which services are active [System X] *#001#
Charge advice (before call) *40* (Number)
Charge advice (All calls) *411#
Charge advice (During call) "R"(to hold call) *40#(Call will be reconnected)
Cancel all calls charge advice #411#
Reminder call *55*(Time in 24 hour format)#
Cancel reminder call #55#
Call Divert - all calls - activate *21*(Number to divert to)#
Call Divert - all calls - to check *#21#
Call Divert - all calls - to cancel #21#
Call Divert - on busy - to activate *67*(Number to divert to)#
Call Divert - on busy - to check *#67#
Call Divert - on busy - to cancel #67#
Call Divert - on no reply - to activate *61*(Number to divert to)#
Call Divert - on no reply - to check *#61#
Call Divert - on no reply - to cancel #61#
Call waiting on *43#
Call waiting off #43#
Call waiting - to check condition *#43#
Call waiting - to answer 2nd caller Recall + 2
Call waiting - remove beeps during call Recall + 0
"Ring back" (Camp on busy) 5
Cancel ring back #37#
Caller display on *234#
Caller display off #234#
BT call minder (voice mail) 1571
Check called number 1471
Release CLI 1470 + dialled number
Withhold CLI 141 + dialled number
Access "Choose to refuse" 14258
Call barring on (outgoing) *341 + option number #
(options are 1 = allows 999 and operator, 2 = allows 999 & local, 3 = allows 999 & STD, 4 = bars all operator calls, 5 = bars *, 6 = bars premium adult lines, 7 = bars premium information lines)
Call barring off (outgoing) #341*(PIN code)#
Incoming calls barred off [System X] #261#
Incoming calls barred on *261#
Incoming calls barred off #261*(PIN code)#

Sounds like your phone or line is now short circuit and is holding the line so it appears busy to incoming callers. Try disconnecting the pnone and line right up to the incoming point of your house to find the problem.

You need to know what extension is causing the forward directly to voice mail. Chances are that this extension has ringing lines programmed to it and the forward on busy is to voice mail. ANY PHONE THAT HAS RINGING LINES SHOULD NOT BE SET TO FORWARD ON BUSY. If they happen to be on the phone when a call comes in it will go straight to their personal mailbox.

Caller ID information is sent after the first full ring. If the call is answered too soon, the caller ID information may not have been sent yet. Some of the many and varied networks do not send caller ID information. In this case you may notice that caller ID is missing only on calls from certain callers. Occasionally bad data is sent, causing your phone to reject it.

With the exception of not being to dial out, it sounds like your DND or do not disturb button is on,The feature can be turned back off by either pressing the DND button again or entering feature #85.

The User Guide will give you all the information

Log into your TalkSwitch Management Software.
Go to Telephone Lines.
Under each incoming line make sure that Caller ID is checked.
Click File> Save
Hopefully this will fix it for you.

turn off dnd

Feature 69 feature.