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<td id="header-avatar-image-container" valign="top" style="padding: 0px; border-collapse: collapse; vertical-align: top; width: 32px; padding-right: 9px"><a href="https://wiki.asterisk.org/wiki/display/~rnewton?src=email" style="color: #3b73af; text-decoration: none"><img id="header-avatar-image" class="image_fix" src="cid:avatar_925838d3d8b1f71935f30b314c925d64" height="32" width="32" border="0" style="border-radius: 3px; vertical-align: top" /></a></td>
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<td class="notification-comment-pattern-container mobile-resize-text" style="padding: 0px; border-collapse: collapse; padding: 0px"><strong>Change comment:</strong> fixed errors, and added basic examples</td>
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<td id="page-title-pattern-icon-image-container-cell" style="padding: 0px; border-collapse: collapse; width: 16px; padding: 9px 8px 0px 0px; mso-text-raise: 5px; mso-line-height-rule: exactly"><a href="https://wiki.asterisk.org/wiki/display/AST/Pre-Bridge+Handlers?src=email" title="page icon" style="vertical-align: top;; color: #3b73af; text-decoration: none"><img style="vertical-align: top; display: block;" src="cid:page-icon" alt="page icon" title="page icon" height="16" width="16" border="0" /></a></td>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;"><span class="diff-html-removed" id="removed-diff-0" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB/5635/60fd2eb45debbf4ede2b669f4c9b96b4ce40a937.48/_/images/icons/macrobrowser/dropdown/warning.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>Warning</span></th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; padding: 0px; border-collapse: collapse"> <p style="margin: 10px 0 0 0; margin-top: 0"> <span class="diff-html-removed" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">Under Construction!</span> </p> </td>
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</table> <h1 id="Pre-BridgeHandlers-Overview" class="diff-block-context" style="margin: 10px 0 0 0; font-size: 24px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Overview</h1> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0">Pre-bridge handlers allow you to execute dialplan subroutines on a channel after the call has been initiated and the channels have been created, but before connecting the caller to the callee. <span class="diff-html-added" id="added-diff-0" style="font-size: 100%; background-color: #ddfade;">Handlers for the </span><a class="confluence-link unresolved" href="#" style="color: #3b73af; text-decoration: none"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Dial application</span></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> allow both the older </span><a class="confluence-link unresolved" href="#" style="color: #3b73af; text-decoration: none"><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">macro</span></strong></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> and the newer </span><a class="confluence-link unresolved" href="#" style="color: #3b73af; text-decoration: none"><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">gosub</span></strong></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> routines to be executed. These handlers are executed on the </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">called party</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> channel, after it is </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">answered</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">, but </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">pre-bridge</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">.</span> </p> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0">If you want to execute routines<strong></strong>earlier in the call <span class="diff-html-added" id="added-diff-1" style="font-size: 100%; background-color: #ddfade;">lifetime </span>then check out the <a class="confluence-link unresolved" href="#" style="color: #3b73af; text-decoration: none">Pre-Dial Handlers</a> section.</p> <p class="diff-block-context" style="margin: 10px 0 0 0">Pre-bridge handlers are invoked using flags a dialplan application call. The flags are documented in the application help documentation within Asterisk, however we will provide some examples below. You should always check the CLI or wiki application docs for any updates.</p> <h2 id="Pre-BridgeHandlers-Syntax" class="diff-block-context" style="margin: 10px 0 0 0; font-size: 20px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Syntax</h2> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-removed" id="removed-diff-1" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">Pre-bridge handlers </span><span class="diff-html-added" id="added-diff-2" style="font-size: 100%; background-color: #ddfade;">There are two flags </span>for the <span class="diff-html-changed" id="changed-diff-0" style="background-color: #d6f0ff;">Dial application</span><span class="diff-html-removed" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"> </span><span class="diff-html-removed" id="removed-diff-2" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">allow both the older </span><strong><span class="diff-html-removed" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">macro</span></strong><span class="diff-html-removed" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"> or the newer </span><strong><span class="diff-html-removed" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">gosub</span></strong><span class="diff-html-removed" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"> routines to be executed. These handlers are executed on the </span><strong><span class="diff-html-removed" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">called party</span></strong><span class="diff-html-removed" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"> channel</span><span class="diff-html-added" id="added-diff-3" style="font-size: 100%; background-color: #ddfade;">, </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">M</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> and </span><strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">U</span></strong><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">.</span> </p> <h3 id="Pre-BridgeHandlers-Mflag" class="diff-block-target diff-block-context" style="margin: 10px 0 0 0; font-size: 16px; line-height: 25px; margin: 30px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">M flag</span> </h3> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">The M flag allows a </span><a class="confluence-link unresolved" href="#" style="color: #3b73af; text-decoration: none"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">macro</span></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> and arguments to be specified. You must specify the macro name, leaving off the 'macro-' prefix</span>.</p>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; padding: 0px; border-collapse: collapse"> <pre style="margin: 10px 0 0 0; margin-top: 0">M(<span class="diff-html-added" id="added-diff-4" style="font-size: 100%; background-color: #ddfade;">macro</span>[<span class="diff-html-removed" id="removed-diff-3" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;"><MACRO_RESULT>^[context^]exten^]priority[(arg1[</span><span class="diff-html-added" id="added-diff-5" style="font-size: 100%; background-color: #ddfade;">^arg[</span>^...]<span class="diff-html-removed" id="removed-diff-4" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">[^argN])])
U([<GOSUB_RESULT>^[context^]exten^]priority[(arg1[</span><span class="diff-html-added" id="added-diff-6" style="font-size: 100%; background-color: #ddfade;">])</span>
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</table> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">The variable MACRO_RESULT can be set with certain options inside the specified macro to determine behavior when the macro finishes. The options are documented in the </span><a class="confluence-link unresolved" href="#" style="color: #3b73af; text-decoration: none"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Dial application documentation</span></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">.</span> </p> <h3 id="Pre-BridgeHandlers-Uflag" class="diff-block-target diff-block-context" style="margin: 10px 0 0 0; font-size: 16px; line-height: 25px; margin: 30px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">U flag</span> </h3> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">The U flag allows a </span><a class="confluence-link unresolved" href="#" style="color: #3b73af; text-decoration: none"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">gosub</span></a><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> and arguments to be specified. You must remember to call Return inside the gosub.</span> </p>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; padding: 0px; border-collapse: collapse"> <pre style="margin: 10px 0 0 0; margin-top: 0">
<span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">U(x[^arg[</span>^...]<span class="diff-html-removed" id="removed-diff-5" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">[^argN</span>])<span class="diff-html-removed" id="removed-diff-6" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">])</span>
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</table> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0">The <span class="diff-html-removed" id="removed-diff-7" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">MACRO_RESULT and </span><span class="diff-html-added" id="added-diff-7" style="font-size: 100%; background-color: #ddfade;">variable </span>GOSUB_RESULT <span class="diff-html-removed" id="removed-diff-8" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">arguments </span>can be <span class="diff-html-removed" id="removed-diff-9" style="font-size: 100%; background-color: #ffe7e7; text-decoration: line-through;">populated with a variety of options to specify certain actions on return of the routine. Those </span><span class="diff-html-added" id="added-diff-8" style="font-size: 100%; background-color: #ddfade;">set within certain options inside the specified gosub to determine behavior when the gosub returns. The </span>options are documented in the <a class="confluence-link unresolved" href="#" style="color: #3b73af; text-decoration: none">Dial application documentation</a>.</p> <h2 id="Pre-BridgeHandlers-Examples" class="diff-block-context" style="margin: 10px 0 0 0; font-size: 20px; font-weight: normal; line-height: 30px; margin: 40px 0 0 0">Examples</h2> <p class="diff-block-target diff-block-context" style="margin: 10px 0 0 0"> <span class="diff-html-added" id="added-diff-9" style="font-size: 100%; background-color: #ddfade;">In both examples 1 and 2, one extension dials another and a Playback is executed from within the subroutine on the called party's channel after they answer.</span> </p> <h3 id="Pre-BridgeHandlers-Example1-Executingapre-bridgemacrohandler" class="diff-block-target diff-block-context" style="margin: 10px 0 0 0; font-size: 16px; line-height: 25px; margin: 30px 0 0 0"> <span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">Example 1 - Executing a pre-bridge macro handler</span> </h3>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; padding: 0px; border-collapse: collapse"> <pre style="margin: 10px 0 0 0; margin-top: 0">
<span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">[from-internal]
exten = 6001,1,Dial(PJSIP/ALICE,30,M(announcement))
[macro-announcement]
exten = s,1,NoOp()
same = n,Playback(tt-weasels)
same = n,Hangup()</span>
</pre> </td>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB/5635/60fd2eb45debbf4ede2b669f4c9b96b4ce40a937.48/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</span></th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; padding: 0px; border-collapse: collapse"> <pre style="margin: 10px 0 0 0; margin-top: 0">
<span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> -- Executing [6001@from-internal:1] Dial("PJSIP/BOB-00000014", "PJSIP/ALICE,30,M(announcement)") in new stack
-- Called PJSIP/ALICE
-- PJSIP/ALICE-00000015 is ringing
-- PJSIP/ALICE-00000015 answered PJSIP/BOB-00000014
-- Executing [s@macro-announcement:1] NoOp("PJSIP/ALICE-00000015", "") in new stack
-- Executing [s@macro-announcement:2] Playback("PJSIP/ALICE-00000015", "tt-weasels") in new stack
-- <PJSIP/ALICE-00000015> Playing 'tt-weasels.gsm' (language 'en')
-- Channel PJSIP/BOB-00000014 joined 'simple_bridge' basic-bridge <612c2313-98bf-48ce-89b1-d530b06e44d7>
-- Channel PJSIP/ALICE-00000015 joined 'simple_bridge' basic-bridge <612c2313-98bf-48ce-89b1-d530b06e44d7>
-- Channel PJSIP/BOB-00000014 left 'native_rtp' basic-bridge <612c2313-98bf-48ce-89b1-d530b06e44d7>
-- Channel PJSIP/ALICE-00000015 left 'native_rtp' basic-bridge <612c2313-98bf-48ce-89b1-d530b06e44d7>
== Spawn extension (from-internal, 6001, 1) exited non-zero on 'PJSIP/BOB-00000014'</span>
</pre> </td>
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</table> <p class="diff-block-context" style="margin: 10px 0 0 0"> </p> <p class="diff-block-context" style="margin: 10px 0 0 0"> </p> <h3 id="Pre-BridgeHandlers-Example2-Executingapre-bridgegosubhandler" class="diff-block-target diff-block-context" style="margin: 10px 0 0 0; font-size: 16px; line-height: 25px; margin: 30px 0 0 0"> <span class="diff-html-added" id="added-diff-10" style="font-size: 100%; background-color: #ddfade;">Example 2 - Executing a pre-bridge gosub handler</span> </h3>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; padding: 0px; border-collapse: collapse"> <pre style="margin: 10px 0 0 0; margin-top: 0">
<span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;">[from-internal]
exten = 6002,1,Dial(PJSIP/BOB,30,U(sub-announcement))
[sub-announcement]
exten = s,1,NoOp()
same = n,Playback(tt-weasels)
same = n,Return()</span>
</pre> </td>
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<th class="diff-macro-title" style="background-color: transparent; text-align: left; font-weight: normal;padding: 5px;"><span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"><span class="icon macro-placeholder-icon" style="background-color: ;line-height: 20px;"><img src="https://wiki.asterisk.org/wiki/s/en_GB/5635/60fd2eb45debbf4ede2b669f4c9b96b4ce40a937.48/_/images/icons/macrobrowser/dropdown/noformat.png" style="padding-right: 5px; vertical-align: text-bottom;" /> </span>No Format</span></th>
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<td class="diff-macro-body" style="background-color: #fff;border: 1px solid #dddddd;padding: 10px;; padding: 0px; border-collapse: collapse"> <pre style="margin: 10px 0 0 0; margin-top: 0">
<span class="diff-html-added" style="font-size: 100%; background-color: #ddfade;"> -- Executing [6002@from-internal:1] Dial("PJSIP/ALICE-00000016", "PJSIP/BOB,30,U(sub-announcement)") in new stack
-- Called PJSIP/BOB
-- PJSIP/BOB-00000017 is ringing
-- PJSIP/BOB-00000017 answered PJSIP/ALICE-00000016
-- PJSIP/BOB-00000017 Internal Gosub(sub-announcement,s,1) start
-- Executing [s@sub-announcement:1] NoOp("PJSIP/BOB-00000017", "") in new stack
-- Executing [s@sub-announcement:2] Playback("PJSIP/BOB-00000017", "tt-weasels") in new stack
-- <PJSIP/BOB-00000017> Playing 'tt-weasels.gsm' (language 'en')
-- Executing [s@sub-announcement:3] Return("PJSIP/BOB-00000017", "") in new stack
== Spawn extension (from-internal, , 1) exited non-zero on 'PJSIP/BOB-00000017'
-- PJSIP/BOB-00000017 Internal Gosub(sub-announcement,s,1) complete GOSUB_RETVAL=
-- Channel PJSIP/ALICE-00000016 joined 'simple_bridge' basic-bridge <16e76a40-4a24-441d-a2b2-5c9ddfb21d7a>
-- Channel PJSIP/BOB-00000017 joined 'simple_bridge' basic-bridge <16e76a40-4a24-441d-a2b2-5c9ddfb21d7a>
-- Channel PJSIP/BOB-00000017 left 'native_rtp' basic-bridge <16e76a40-4a24-441d-a2b2-5c9ddfb21d7a>
-- Channel PJSIP/ALICE-00000016 left 'native_rtp' basic-bridge <16e76a40-4a24-441d-a2b2-5c9ddfb21d7a>
== Spawn extension (from-internal, 6002, 1) exited non-zero on 'PJSIP/ALICE-00000016'</span>
</pre> </td>
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