3.1.1. Subscription Duration SUBSCRIBE requests SHOULD contain an "Expires" header (defined in SIP [1]). This expires value indicates the duration of the subscription. In order to keep subscriptions effective beyond the duration communicated in the "Expires" header, subscribers need to refresh subscriptions on a periodic basis using a new SUBSCRIBE message on the same dialog as defined in SIP [1]. If no "Expires" header is present in a SUBSCRIBE request, the implied default is defined by the event package being used. 200-class responses to SUBSCRIBE requests also MUST contain an "Expires" header. The period of time in the response MAY be shorter but MUST NOT be longer than specified in the request. The period of time in the response is the one which defines the duration of the subscription. An "expires" parameter on the "Contact" header has no semantics for SUBSCRIBE and is explicitly not equivalent to an "Expires" header in a SUBSCRIBE request or response. A natural consequence of this scheme is that a SUBSCRIBE with an "Expires" of 0 constitutes a request to unsubscribe from an event. In addition to being a request to unsubscribe, a SUBSCRIBE message with "Expires" of 0 also causes a fetch of state; see section 3.3.6. Notifiers may also wish to cancel subscriptions to events; this is useful, for example, when the resource to which a subscription refers is no longer available. Further details on this mechanism are discussed in section 3.2.2.
You can set the MWI subscription max / min in System -> MWICheck the SLA and RLS services for service controlled settings. The commercial version of the product uses a different service for BLF/BLA that can scale to about 5,000 users. It's much more efficient.
300 Brickstone Square
Suite 104
Andover, MA. 01810
--
You received this message because you are subscribed to the Google Groups "sipxcom-dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email to sipxcom-dev...@googlegroups.com.
To post to this group, send email to sipxc...@googlegroups.com.
Visit this group at https://groups.google.com/group/sipxcom-dev.
To view this discussion on the web visit https://groups.google.com/d/msgid/sipxcom-dev/5e3cf8ec-02fd-409c-b09b-a40431eb27a5%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.