modules\core\functions.inc.php
查找 macro-dialout-trunk
然后
$ext->add($context, $exten, '', new ext_dial('${OUT_${DIAL_TRUNK}}/${OUTNUM}', '300,${DIAL_TRUNK_OPTIONS}')); // Regular Trunk Dial
$ext->add($context, $exten, 'skipoutnum', new ext_dial('${pre_num:4}${the_num}${post_num}', '300,${DIAL_TRUNK_OPTIONS}'));
300 改成你自己设置的时间