Panasonic KX-TDA15 Features Manual page 189

• DISA Mute Time
It is possible to set the Mute time until the outgoing message (OGM) plays and the PBX starts to receive
the DTMF signalling after the caller reaches the DISA line.
→ 3.8.4 [2-3] Timers & Counters—DISA / Door / Reminder / U. Conf—DISA—Mute & OGM Start Timer
after Answering
• End of Call Detection
If a call through DISA is routed to a trunk, DISA can be used to detect the end of the call. This function
can be disabled through system programming. If disabled, DISA is released when the trunk-to-trunk
connection is made.
The following three types of tone detection can be enabled for each trunk group to disconnect a trunk-
to-trunk call via DISA.
– Silence Detection
→ 3.9.1 [3-1-1] Trunk Group—TRG Settings—Main—DISA Tone Detection—Silence
→ [475] DISA Silence Detection
– Continuous Signal Detection
→ 3.9.1 [3-1-1] Trunk Group—TRG Settings—Main—DISA Tone Detection—Continuous
→ [476] DISA Continuous Signal Detection
– Cyclic Signal Detection
→ 3.9.1 [3-1-1] Trunk Group—TRG Settings—Main—DISA Tone Detection—Cyclic
→ [477] DISA Cyclic Signal Detection
• Trunk-to-Trunk Call Duration Limitation
For a call between two outside parties, even if end of call detection cannot be performed, the call can
be disconnected by a system timer. (→ 1.10.8 Trunk Call Limitation) If the timer expires, the line will be
disconnected unless the originating caller extends the time by sending any DTMF signalling. The caller
can prolong the call duration within the preprogrammed time period and preprogrammed number of
times.
3.8.4 [2-3] Timers & Counters—DISA / Door / Reminder / U. Conf
→ DISA—CO-to-CO Call Prolong Counter
→ DISA—CO-to-CO Call Prolong Time
→ [210] DISA Trunk-to-Trunk Call Prolong Time
• Automatic DISA Activation
DISA can be set through system programming to automatically activate for the following types of trunk-
to-trunk call, to enable detection of the end of the call.
– When a trunk call is forwarded to another trunk
– When a trunk call is transferred to another trunk
– When a trunk call to an incoming call distribution group is answered by an outside destination
member
Before the call is made, the PBX confirms that a DISA port is available. If no DISA ports are available,
the call is not routed to a trunk. For transferred calls or calls to an ICD Group, if the DISA port has
become unavailable when the trunk-to-trunk conversation is actually established, the call is established
without DISA.
When using this feature, the Trunk-to-Trunk Call Limitation timer should be enabled. In addition,
prolonging the call through DTMF signalling is not available.
• DISA Call Transfer from Outside Destination
An outside party such as a cellular phone can transfer a trunk call to an extension at the PBX by
pressing "#" + extension number, if DISA is connected by the Automatic DISA Activation feature. This
feature can be enabled or disabled through system programming.
– The KX-TDA3920 SD Memory Card for Software Upgrade to Enhanced Version is required to use
this feature.
– DISA security mode should be set to No Security or Trunk Security.
1.15 Optional Device Features
Feature Guide 189