(registered by RFC4351)

MIME media type name: audio

MIME subtype name: t140c

Required parameters:
  rate: The RTP timestamp clock rate, which is equal to the
  sampling rate.  This parameter SHOULD have the same value as
  for any audio codec packets interleaved in the same RTP
  stream.

Optional parameters:
  cps: The maximum number of characters that may be received
  per second.  The default value is 30.

Encoding considerations: T.140 text can be transmitted with RTP
as specified in RFC 4351.

Security considerations: See section 8 of RFC 4351.

Interoperability considerations: None

Published specification: ITU-T T.140 Recommendation.
                         RFC 4351.

Applications which use this media type:
  Text communication systems and text conferencing tools that
  transmit text associated with audio and within the same RTP
  session as the audio, such as PSTN gateways that transmit
  audio and text signals between two PSTN textphone users
  over an IP network.

Additional information:  This type is only defined for transfer
  via RTP.

  Magic number(s): None
  File extension(s): None
  Macintosh File Type Code(s): None

Person & email address to contact for further information:
  Paul E. Jones
  E-mail: paulej&packetizer.com

Intended usage: COMMON

Author                        / Change controller:
  Paul E. Jones               | IETF avt WG delegated from the IESG
  paulej&packetizer.com       |