standard.net.sip.sdp_message_a_attribute_del_at_index
sdp_message_a_attribute_del_at_index is available since version 2.
Prototype:
number sdp_message_a_attribute_del_at_index(handler oParam1, number nParam2, string szParam3, number nParam4);
Description:
TODO: Document this
Return value:
Return number