ISDN Demonstrator User’s Manual
40-400-00011, Rev. B
20
STEP 5
Remove all communications devices from the Simulator and
press the DOWNLOAD button. An automatic RESTART is
issued as part of the DOWNLOAD.
Note: This setting is not available when EKTS is disabled. While the
Simulator recognizes the CONFerence and TRANSfer call control
messages, it does not perform these services at this time. The ISDN
Demonstrator returns a reject message, as if the service was not
subscribed.
Additional Call Offering (ACO)
The ISDN-BRI equivalent to Call Waiting is
Additional Call Offering
or ACO.
Terminals that support ACO must be able to perform two functions: first, they
must have the ability to generate tones, rather than rely on tones sent on a B
Channel from the switch. Second, they must be able to recognize B Channel
selection during the connection phase of a call, rather than the setup phase.
If the terminal supports these features, then the switch notifies the terminal of
every call, even when both B Channels are busy (a condition referred to as
interface busy). The terminal may then start its own alerting tone and, if it
supports
CACH
operation, indicate the call visually.
If the user or a prioritizing system chooses to release a B Channel either by
hanging up or putting a call on hold, the terminal can accept the new
incoming call by issuing a CONNect message. The switch determines which
B Channel was released and assigns it to the new call in a CONNect
ACKnowledge message.
If your communications device does not support ACO or if you want to test
the operation of a device during call blocking, disable this setting.
STEP 1
Run the Windows based configuration software.
STEP 2
Select
the ACO setting.
STEP 3
Change
the
setting.
STEP 4
Select
SAVE
to save the setting.
STEP 5
Remove all communications devices from the Simulator and
press the DOWNLOAD button. An automatic RESTART is
issued as part of the DOWNLOAD.
Note: This setting is not available when EKTS is disabled.
