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Chapter 7. Toll Restriction (FF7)
DTMF Signaling During Incoming Calls For TRS
Types 0-6
Software Version: All Versions
Address: FF7 1# 2# (0 or 1)#
Description
This address determines if DTMF signaling can be sent to the CO after an
extension picks up an incoming trunk call.
If an extension receives a call on a trunk assigned to TRS type 0-6, the
extension user may try to bypass TRS restrictions by dialing an outgoing call
while still off-hook. (After the outside caller hangs up, sometimes the CO
sends dial tone to the called party if they remain off-hook.)
The DBS can block these bypasses by disabling DTMF signaling during
incoming calls. If this address is set to "0" (disable DTMF signaling), the
user will not be able to dial out while still off-hook from an incoming call --
even if they transfer the call to another extension with no TRS restrictions.
This address also affects indirect pickup of trunk calls (press a DSS/BLF key
to pick up a call ringing on another extension). If this address is set to "0",
the DSS/BLF phone user will also not be able to dial out.
Programming
Notes
No Interaction With TRS Type 7. This address does not affect trunks
assigned to TRS type 7, which allows all outbound dialing.
No DSS/BLF Interaction With TRS Type 0. DSS/BLF keys cannot be used
to pick up calls on trunks assigned TRS type 0. Because of this built-in
restriction, the DTMF Signaling setting does not apply.
No Interaction With FLASH Key. If an extension user attempts to dial out
by pressing the FLASH key during an incoming trunk call, the DBS will
check for TRS restrictions, regardless of the DTMF Signaling setting.
Page 7-6
FF7 1# 2# (0 or 1)#
0=Disable DTMF signaling on extensions
1=Enable DTMF signaling on extensions
DBS Manual - Revised April 2000
Section 400-Programming
during incoming calls.
during incoming calls.
DBS-2.3/9.2-400
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