[system-internet-udp] type=transport protocol=udp bind=184.108.40.206 [system-internet-tcp] type=transport protocol=tcp bind=220.127.116.11 [system-local-udp] type=transport protocol=udp bind=192.168.1.1 [system-udp-tcp] type=transport protocol=tcp bind=192.168.1.1 [phone-internet] type=endpoint transport=system-internet-udp [phone-local] type=endpoint transport=system-local-udp
This example includes two endpoints which are each present on different networks. To ensure that outgoing requests to each endpoint travel over the correct transport the transport has been explicitly specified on each.
IPv6 Only (Single Interface)
It might be tempting to use a wildcard IPv6 address to bind a single transport to allow both IPv6 and IPv4. In this configuration IPv6 mapped IPv4 addresses will be used which is unsupported by PJSIP. This will cause a SIP message parsing failure.