Section: 13.10 Default Conference Factory URI for MMTel
Content: The Default Conference Factory URI for MMTel shall take the form of a SIP URI (see IETF RFC 3261 [26]) with a host portion set to the home network domain name as described in clause 13.2 prefixed with "conf-factory.". The user portion shall be set to "mmtel". Examples of the Default Conference Factory URI for MMTel can be found below: EXAMPLE 1: "sip:mmtel@conf-factory.operator.com" when the UE has a home network domain name of operator.com. EXAMPLE 2: "sip:mmtel@conf-factory.ims.mnc015.mcc234.3gppnetwork.org" for 3GPP systems, when the UE with no ISIM application has a home network domain name of ims.mnc015.mcc234.3gppnetwork.org derived from the same example IMSI as described in clause 13.2.