View Source Transport mechanisms
Callback interface
The callback interface of the transport module contains several functions. Some of which are mandatory while others are only optional:
- send_message- Send a message. Mandatory
- block- Block the transport. Optional- This function is usefull for flow control. 
- unblock- Unblock the transport. Optional
For more detail, see the megaco_transport behaviour definition.
Examples
The Megaco/H.248 application contains implementations for the two protocols
specified by the Megaco/H.248 standard; UDP, see megaco_udp, and TCP/TPKT,
see megaco_tcp.