[SR-Users] what is the difference between outbound module and stun module

[vast]

Hi,
  what is the difference between （make FLAVOUR=kamailio cfg STUN=1 outbound module ）and （stun module）？
and the debug log has this：
DEBUG: <core> [sr_module.c:707]: find_mod_export_record(): find_export_record: <bind_ob> not found 
INFO: rr [../outbound/api.h:54]: ob_load_api(): Failed to import bind_ob
INFO: rr [rr_mod.c:159]: mod_init(): outbound module not available



can you  tell me about it  , Thank you
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20140603/eff7d169/attachment.html>