[Serusers] nathelper compability

[Günther Starnberger]

hello,

after googling for some information about nathelper it seems that
nathelper should be able to traverse any type of NAT (even symmetric
ones) as long as both user agents support symmetric RTP.

is this right?

are there any situations where just using nathelper may not be
sufficient? (such as transfers between an internal phone to an external
phone or transfers between two internal phones).

bye,
/gst

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