[asterisk-users] SIP 18x Messages

[Tim King]

When I make an outbound call I hear a half of a ring and than silence until
the call opens up.

It seems asterisk is sending a 183 after the 180 message. My CPE device does
not support multiple 18x messages in the same call setup.  When we receive
the 180 we present ring back to the phone, but when we receive the 183 we
get confused and stop the ring back tone, but do not open up the early media
path for the ring back to be played from the network.

In Metaswitch the configuration knob to correct this is “Superfluous 18x
messages”, I don’t know what it takes to configure Asterisk that way. Can
anyone help with this.
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