Got this figured out. externip= does work if the other NAT-related options are also enabled, plus it appears that Trixbox (which is what the end-user was using, it seems) handles this well in its config file structure regardless.
-- Alex Balashov Evariste Systems Web : http://www.evaristesys.com/ Tel : +1-678-954-0670 Direct : +1-678-954-0671 _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users