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+---
+labels:
+- 'Stage-Beta'
+summary: 'XEP-0198: Reliability and fast reconnects for XMPP'
+...
+
+Introduction
+============
+
+By default XMPP is as reliable as your network is. Unfortunately in some
+cases that is not very reliable - in some network conditions disconnects
+can be frequent and message loss can occur.
+
+To overcome this, XMPP has an optional extension (XEP-0198: Stream
+Management) which, when supported by both the client and server, can
+allow a client to resume a disconnected session, and prevent message
+loss.
+
+Details
+=======
+
+When using XEP-0198 both the client and the server keep a queue of the
+most recently sent stanzas - this is cleared when the other end
+acknowledges they have received the stanzas. If the client disconnects,
+instead of marking the user offline the server pretends the client is
+still online for a short (configurable) period of time. If the client
+reconnects within this period, any stanzas in the queue that the client
+did not receive are re-sent.
+
+If the client fails to reconnect before the timeout then it is marked
+offline as normal, and any stanzas in the queue are returned to the
+sender as a "recipient-unavailable" error.
+
+Configuration
+=============
+
+  Option                      Default           Description
+  --------------------------- ----------------- -----------------------------------------------------------------------------------------
+  smacks\_hibernation\_time   300 (5 minutes)   The number of seconds a disconnected session should stay alive for (to allow reconnect)
+
+Compatibility
+=============
+
+  ----- --------------------------------------------------------------------------------------------------------------------------------------------------------
+  0.9   Works
+  0.8   Works, use version [7693724881b3](http://prosody-modules.googlecode.com/hg-history/7693724881b3f3cdafa35763f00dd040d02313bf/mod_smacks/mod_smacks.lua)
+  ----- --------------------------------------------------------------------------------------------------------------------------------------------------------
+
+Clients
+=======
+
+Clients that support XEP-0198:
+
+-   Gajim
+-   Swift (but not resumption, as of version 2.0 and alphas of 3.0)
+-   Psi (in an unreleased branch)
+-   Yaxim