e/Open Phone Abstraction Library

Information
has gloss	eng: The Open Phone Abstraction Library (OPAL) is a continuation of the open source openh323 project to support a wide range of commonly used protocols used to send voice, video and fax data over IP networks rather than being tied to the H.323 protocol. Initially OPAL supported the H.323 and SIP protocols but has grown to include Asterisk IAX2.
lexicalization	eng: Open Phone Abstraction Library
instance of	c/VoIP protocols