A.4 Example of MMS interaction with T.30 Facsimile Services

23.1403GPPFunctional descriptionMultimedia Messaging Service (MMS)Stage 2TS

Figure 11: Example of MMS interaction with Facsimile Services based on ITU-T.37

For the transfer of facsimile data via store-and-forward mechanisms ITU-T.37 [31] procedures have been standardised. These are identified as appropriate in the MMS environment for the interworking with T.30 [32] facsimile services. What the relevant MMSE parts are supposed to look like for a T.37 approach is depicted in figure 11. The MMS Relay interfaces with a T.37 Fax Gateway. For the Gateway’s communication with the MMS Relay the appropriate protocol is SMTP. I.e., the protocol to be used on the interface between MMS-Relay and the Fax GW is identical to the one used between different MMS-Relays as specified in section 6.6.

Note: The MMS Relay – MMS Server interface is not in the scope of this subsection but described in A.3.

Towards the PSTN the Fax-GW terminates the T.30 facsimile protocol. Mobile terminated fax data will be converted into TIFF[36] image format and forwarded to the MMS Relay as an attachment in an IETF internet email. In case of mobile originated fax messages the Fax-GW receives a written email provided with the receiver’s fax number from the MMS Relay. Depending on the functions of the Fax-GW this email may contain plain text only or additional attachments, too. Although T.37 requires only TIFF format support there are Fax-GWs out on the market that permit many different formats to be included.