Communication of information

A method according to any of the preceding claims, wherein the method comprises:

• indicating the at least one codec related feature which the network does not support with the aid of a SIP (Session Initiation Protocol) Warning header field.

A method according to any of the preceding claims, wherein the method comprises:

• indicating the at least one codec related feature which the network does not support, with the aid of a header field modifiable by the network.

A method according to any of the preceding claims, wherein the method comprises:

• indicating, in the header portion of the message, concerning at least one of the codec related features whether that feature is supported by the network with the aid of a mask having a plurality of mask elements each mask element being representative of one codec related feature.

A method according to any of the preceding claims, wherein the message body is an SDP (Session Description Protocol) body of a SIP INVITE message, and the header portion comprises one or more SIP header fields for indicating, by the network, concerning at least one of the codec related features whether that feature is supported by the network.

A method according to any of the preceding claims, wherein at least one of the communication devices is a mobile communication device.

A method according to any of the preceding claims, wherein the set of codec related features comprises a set of operational modes/bit rates of an AMR (Adaptive Multi Rate) codec.

A transmitting communication device for communicating information to a receiving communication device via a network, the transmitting communication device comprising:

• a transmitter for sending a message, via the network, to the receiving communication device the message comprising a header portion and a message body, the transmitting communication device being configured:
• to indicate, in the message body, a set of codec related features that the transmitting communication device supports for a session between the transmitting communication device and the receiving communication device, wherein the transmitting communication device is configured:
• to send the message in a format which enables the network to indicate, in the header portion of the message, concerning at least one of the codec related features whether that feature is supported by the network.

A system comprising a first communication device, a network and a second communication device for communicating information from the first communication device to the second communication device via the network, the first communication device comprising:

• a transmitter for sending a message from the first communication device, via the network, to the second communication device the message comprising a header portion and a message body, the first communication device being configured:
• to indicate, in the message body, a set of codec related features that the first communication device supports for a session between the first communication device and the second communication device, wherein the network comprises:
• a processing unit for indicating in the header portion of the message, concerning at least one of the codec related features whether that feature is supported by the network.

A message for communicating information from a first communication device to a second communication device via a network, the message being configured:

• to be sent from the first communication device, via the network, to the second communication device the message comprising:
• a message body for indicating a set of codec related features that the first communication device supports for a session between the first communication device and the second communication device, wherein the message further comprises:
• a header portion for indicating concerning at least one of the codec related features whether that feature is supported by the network.

A computer program product for implementing a network entity the computer program product comprising:

• computer executable code for enabling the network entity to handle a message being transferred from a first communication device to a second communication device the message comprising a message body for indicating a set of codec related features that the first communication device supports for a session between the first communication device and the second communication device and a header portion;
• and
• computer executable code for indicating in the header portion of the message, concerning at least one of the codec related features whether that feature is supported by the network entity.