[Serusers] phone + pstn with ser and cisco gateway

[Juha Heinanen]

Steve Blair writes:

 >    I've never looked into that but by default it does not. I thought I would
 > need "symmtric signaling" in order to define a peer in my Asterisk sip.conf
 > file but that turned out not to be necessary.

i was asking because of nat detection.  it turned out that nathelper
nat_uac_test("3") does not check port number whereas mediaproxy
client_nat_test("3") requires that both ip address and port in via match
source ip address and port.  so if call comes from cisco gw, ...

i surfed on cisco's web pages, but could not find any command that would
make gw's signaling symmetric.

-- juha