3 Mar
2005
3 Mar
'05
10:58 a.m.
If both parties (GW and SIP client) are not behind NAT (public IP, no
firewall), you do not need nathelper+rtpproxy. Even in the case of a
client behind NAT and the GW with public IP you do not need rtpproxy if
the GW supports symmetric RTP (like Cisco GW does).
regards,
klaus
support wrote:
Hi,
I have tested ser with a T1 trunk GW not behind NAT, but using fixed IP.
I then disable the use of rtpproxy and nathelper. However, when I use
PSTN call to a SIP UA, only ringtones could be heard but no voice
passing through it.
Does it mean that rtpproxy + nathelper must be used even in the case
when UA and PSTN GW are not behind NAT/Firewall?
Thomas
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