tel URL

The SIP NAT function cookie is used when devices in your network are strict about the context portion of SIP messages regarding the conversion of tel URLs. This cookie for the tel URL parameter portion of a SIP message is the following:

tel URL parameter-[13-byte host IP][13 byte optional maddr IP]domain suffix

where:

• tel URL parameter refers to the SIP NAT function’s use url parameter.

  This cookie type is associated with the use url parameter’s phone field value for the SIP NAT.

• [13-byte host IP] refers to the host IP encryption.
• [13 byte optional maddr IP] refers to the maddr IP encryption, if it exists.
• domain suffix refers to the SIP NAT function’s domain suffix field.