22.1003GPPTSUMTS Phase 1
UMTS phase 1 will enable the introduction of a range of new services (e.g. Internet services and Multimedia) and applications with the concept of service capabilities. The service capabilities are bearer services defined by parameters (e.g. QoS attributes) and mechanisms needed to realise services.
6.1 Teleservices and supplementary services
UMTS phase 1 shall at least support the following GSM teleservices currently handled by GSM : speech, emergency call and SMS. UMTS phase 1 shall support these teleservices as stated below:
Speech: A default speech codec shall be specified to provide speech service across the UTRAN and GSM access networks. The selected speech codec shall operate with no discernible loss of speech on handover between the GSM access network and the UTRAN.
Short Message Service-Point to Point (SMS-PP): A short message service point to point shall be provided seamlessly (as far as the user or the users terminal equipment is concerned) across the UMTS and GSM access network.
Short Message Service-Cell Broadcast (SMS-CB): A short message service cell broadcast shall be provided seamlessly (as far as the user or the users terminal equipment is concerned) across the UMTS and GSM network.
Supplementary Services: The standard shall support GSM Release ’99 supplementary services. The control of such supplementary services shall be the same as for GSM, from the user’s perspective.
6.2 Facsimile service (not required for Release ’99)
The UMTS standards are not required to support fax services.
However, it should be noted that a fax service can be provided based on external servers without any impact and requirement on UMTS infrastructure as described in 3GPP TR 22.945 . According to 3GPP TR 22.945  two possibilities to provide a fax service as described briefly below may be provided. The operator may then select either none, one or both services depending on the market needs. The fax service shall inter-work with existing fax technology in the PSTN/ISDN.
A UMTS store-and-forward fax service uses a file or message transfer program to transfer text or images from a mobile terminal to a store and forward unit for subsequent delivery to the facsimile machine in the PSTN/ISDN. The user (or the user’s PC) may receive notification of successful delivery of the fax. Fax messages from PSTN/ISDN to mobile terminals are stored in a store-and-forward unit. The user retrieves the fax message with a file or message transfer program from the store-and-forward unit. The mobile terminal may be notified that a fax message is available.
A UMTS fax service uses an end-to-end fax session between a PSTN/ISDN fax machine and a mobile terminal. This service works end-to-end such that a sender on the PSTN is aware of whether or not the fax has succeeded, and such that a mobile sender is aware of whether or not the fax has succeeded. From the user perspective the end-to-end fax service has the same look and feel as a T.30 based fax service although the PLMN internal transmission is not according to T.30. The end-to-end service may work with ordinary T.30 based fax machines at the mobile end using a mobile fax adapter  with a modem that terminates the analogue 2-wire connection from the fax machine. The conversion between the PLMN internal protocol and the T.30 protocol towards the facsimile machine is performed in a separate server and in a mobile fax adapter towards the T.30 based fax machine at the mobile end.
6.3 Bearer services
UMTS phase 1 shall support GSM phase 2+ Release ’99 data bearer services:
Circuit switched data: Circuit switched data services and "real time" data services shall be provided for interworking with the PSTN/ISDN so that the user is unaware of the access network used (UMTS and GSM access network or handover between access networks). Both transparent (constant delay) and non-transparent (zero error with flow control) services shall be supported. These data services shall operate with minimum loss of data on handover between the GSM access network and the UTRAN.
Packet switched data: Packet switched data services shall be provided for interworking with packet networks such as IP-networks and LANs. The standard shall provide mechanisms which ensure the continuity of packet based services upon handover e.g. between GSM and UMTS.
6.4 Emergency Call
UMTS Phase 1 Release ‘99 shall support an emergency call teleservice as defined in .