Algo 8180 User Manual page 11

Subscribe/Notify RFC (presence)
As above, but supporting Subscribe/Notify per RFC 3856/3863. The only
event supported is "On the Phone" so there is no Ring/Alert Event to
select.
Call to Cancel
This mode provides a method to trigger the 8180 with a ring or relay
input. The 8180 will play the audio file selected under the Basic Settings g
Ring tab continuously until a cancel event is received by dialling the Ring
Extension.
The SIP extension used to trigger the 8180 can be configured using the
Advanced Settings g Advanced Ring/Alert. A ring event on extension 2-5 will
trigger the 8180 when in this mode.
Typical applications for this mode are for safety , security, and
emergency notification, or latched alarms for door openings and other
relay events.
None
Select this mode if the 8180 will not be used for ring or event notification.
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