# SIP information element values

Some of the SIP IEs have predefined values. The following tables specify the SIP IE and list these values:

## SIP_IE_SDP_MEDIA_TYPE

SIP IE | Decimal value
SDP_MEDIA_TYPE_AUDIO | 1
SDP_MEDIA_TYPE_NAS | 2
SDP_MEDIA_TYPE_VIDEO | 3
SDP_MEDIA_TYPE_APP | 4
SDP_MEDIA_TYPE_DATA | 5
SDP_MEDIA_TYPE_IMAGE | 6
SDP_MEDIA_TYPE_CONTROL | 7

## SIP_IE_SDP_MEDIA_PORT

SIP IE | Value
SIP_IE_SDP_MEDIA_PORT_ANY | 1*
SIP_IE_SDP_MEDIA_PORT_NOTSET | 2*
SIP_IE_SDP_MEDIA_PORT_IGNORE | 3*
Actual port number | Numeric value

* These values do not correspond to port numbers.

## SIP_IE_SDP_MEDIA_PROTOCOL

SIP IE | Decimal value
SDP_MEDIA_PROTOCOL_RTP | 1
SDP_MEDIA_PROTOCOL_LOCAL | 2
SDP_MEDIA_PROTOCOL_ATM | 3
SDP_MEDIA_PROTOCOL_UDP | 4
SDP_MEDIA_PROTOCOL_TCP | 5

## SIP_IE_SDP_ENCODING

For SIP_IE_ENCODING, see RFC 1890 for the assigned encodings. The following table lists some typical values:

Encoding method | Value
G711 mu-law | 0
G711 A-law | 8