http://freepbx.org/trac/ticket/1939

--- functions.inc.php 2006-12-07 22:19:25.000000000 -0800
+++ /var/www/html/admin/modules/paging/functions.inc.php  2007-05-02 17:41:49.000000000 -0700
@@ -88,7 +88,7 @@
        $ext->add('ext-paging', "PAGE${xtn}", 'SKIPCHECK', new ext_noop('Seems to be available (state = ${AVAILSTATUS}'));

        if (!$skipheaders) {
-         $ext->add('ext-paging', "PAGE${xtn}", '', new ext_setvar('__SIPADDHEADER', 'Call-Info: \;answer-after=0'));
+         $ext->add('ext-paging', "PAGE${xtn}", '', new ext_setvar('__SIPADDHEADER', 'Call-Info: <sip:broadworks.net>\;answer-after=0'));
          $ext->add('ext-paging', "PAGE${xtn}", '', new ext_setvar('__ALERT_INFO', 'Ring Answer'));
          $ext->add('ext-paging', "PAGE${xtn}", '', new ext_setvar('__SIP_URI_OPTIONS', 'intercom=true'));
        }
@@ -134,7 +134,7 @@
        $ext->add('ext-intercom', '_'.$code.'.', '', new ext_dbget('user-intercom','AMPUSER/${dialnumber}/intercom'));
        $ext->add('ext-intercom', '_'.$code.'.', '', new ext_gotoif('$["${user-intercom}" = "disabled" ]', 'nointercom'));

-       $ext->add('ext-intercom', '_'.$code.'.', '', new ext_setvar('__SIPADDHEADER', 'Call-Info: \;answer-after=0'));
+       $ext->add('ext-intercom', '_'.$code.'.', '', new ext_setvar('__SIPADDHEADER', 'Call-Info: <sip:broadworks.net>\;answer-after=0'));
        $ext->add('ext-intercom', '_'.$code.'.', '', new ext_setvar('__ALERT_INFO', 'Ring Answer'));
        $ext->add('ext-intercom', '_'.$code.'.', '', new ext_setvar('__SIP_URI_OPTIONS', 'intercom=true'));