Matrix ETERNITY NE System Manual 183
Select the same Answer Supervision signal as provided by your CO Network. If the type of Answer
Supervision signal selected in the system does not match with that of the CO network, the call will not be
stored in the Station Message Detail Record (SMDR) buffer. For example, if the CO network does not
support Answer Supervision, but you have selected Polarity Reversal or 12/16KHz as Answer Supervision
Type, the call will be considered as matured and will not be stored in the Station Message Detail Record
(SMDR) buffer. The same would be the case if you selected 12/16KHz when the CO supports Polarity
Reversal.
9. If you selected Pseudo Answer as Answer Supervision signal, configure the Pseudo Answer
Supervision Timer.
This is the time period for which the system will wait before treating a call as matured (regardless of
whether or not it was answered). The range of this Timer is from 001 to 255 seconds. Default: 20 seconds.
When Pseudo Answer is selected as Answer Supervision signal, the call duration measured by the system
will not accurately reflect the actual call duration because the Pseudo Answer Supervision Timer is not
related to the actual call maturity. For example, if the Pseudo Answer Supervision Timer is set to 15
seconds, the call will be considered as matured after 15 seconds, even if it is answered after 20 seconds.
Similarly, if this Timer is set to 80 seconds, but the call was answered after 20 seconds and disconnected
after 40 seconds, this call will never be considered as matured as it ends before 80 seconds.
10. Select the Disconnect Supervision
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signal type supported by your network from the following options.
Default: None.
• None: When there this no signaling supported. Select this option only if there is no Disconnect
Supervision signal supported.
• Polarity Reversal: Call disconnection is signaled as Polarity Reversal when the call is
disconnected by the remote user. For example, if the battery polarity of the CO port is '+ve' for TIP
and '-ve' for RING in speech condition then on disconnection by the remote user, TIP will become '-
ve' and Ring '+ve'. The user gets an Error tone and the CO port is released.
• Open Loop Disconnect: Call Disconnection is signaled in the form of Open Loop, whereby the
Battery voltage on the CO port is removed for a short duration. Voltage is restored after this short
duration. However, the Polarity of Battery Voltage on the CO port is not changed.
This option is to be selected when call disconnection is signaled in the form of Open Loop
Disconnect pulse by the CO network. System will check Open Loop Disconnect signal for the time
duration set in Open Loop Disconnect Timer for each CO port. If the time of the Open Loop signal
detected is less than the Open Loop Disconnect Timer you have set, it will not be considered as
49. It is a signal from the CO network to indicate call disconnection. Whenever a call (incoming or outgoing) made from the CO Trunk
is disconnected by the remote party, the CO network will send Disconnect signal to the CO port. ETERNITY will detect this signal
and release the CO port.
Disconnect Supervision signal is important when a PCO machine is connected to the (SLT Port) ETERNITY and or when ETER-
NITY NE is deployed in a Gateway application.
In such application scenarios, it is desirable that calls that are disconnected by either end - calling party or called party - is termi-
nated by the system and the port is released. If the called (remote) party has disconnected the call but the calling party (extension
that made the outgoing call from ETERNITY) has not disconnected the call, the call remains live within the system.
So, Disconnect Supervision signal is important, particularly when calls are routed from CO-to-CO ports, to indicate to the system
that it needs to disconnect the call and release the port.
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