User manual

MyPBX-SOHO User Manual
www.yeastar.com Page 40
field below
·Local Network Address
'192.168.0.0/255.255.0.0' : All RFC 1918 addresses are local networks;
'10.0.0.0/255.0.0.0' : Also RFC1918;
'172.16.0.0/12':Another RFC1918 with CIDR notation;
'169.254.0.0/255.255.0.0' : Zero conf local network.
·NAT Mode
Global NAT settings (Affects all peers and users);
yes = Always ignore info and assume NAT;
no = Use NAT mode only according to RFC3581;
never = Never attempt NAT mode or RFC3581 support;
route = Assume NAT, don't send rport
·Allow RTP Reinvite
MyPBX by default tries to redirect the RTP media stream (audio) to go directly
from the caller to the callee. Some devices do not support this (especially if
one of them is behind a NAT).
3）Codecs
A codec is a compression or decompression algorithm run against voice as it
is moved between analog (speaking) and digital (VoIP).
u-law: A PSTN standard codec, used in North America, that provides very
good voice quality and consumes 64kbit/s for each direction (receiving and
transmitting) of a VoIP call. u-law should be supported by all VoIP phones.
a-law: A PSTN standard codec, used outside of North America, that
provides very good voice quality and consumes 64kbit/s for each direction
(receiving and transmitting) of a VoIP call. a-law should be supported by all
VoIP phones.
GSM: A wireless standard codec, used worldwide, that provides okay voice
quality and consumes 13.3kbit/s for each direction (receiving and
transmitting) of a VoIP call. GSM is supported by many VoIP phones.
G.726: A PSTN codec, used worldwide, that provides good voice quality and
consumes 32kbit/s for each direction (receiving and transmitting) of a VoIP
call. G.726 is supported by some VoIP phones.