3 Definitions and abbreviations
29.0073GPPGeneral requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)Release 17TS
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
bearer capability information: specific information defining the lower layer characteristics required within the network.
low layer compatibility information: information defining the lower layer characteristics of the terminal.
high layer compatibility information: information defining the higher layer characteristics of the terminal.
compatibility information: this term subsumes the entirety of Bearer Capability, Low Layer Compatibility, High Layer Compatibility, Progress Indicator and Address Information conveyed out‑of‑band prior to call establishment for the support of compatibility checking and terminal/function/service selection at the ISDN‑type user‑network interface.
protocol identifier: information defining the specific protocols utilized for the support of data transfer by a terminal.
progress indicator: information supplied to indicate to the terminal that network interworking has taken place.
out‑of‑band parameter exchange: information exchanged via an associated or non‑associated signalling link e.g. SS No 7.
PSTN: subscriber to network interface supports only analogue terminals.
ISDN: subscriber to network interface supports digital or analogue terminals, plus a standardized user to network associated signalling system and a standardized internetwork signalling system.
autobauding type 1: this information element value may be contained in the setup or call confirm messages from the UE in association with a non transparent data service. This implies that the MSC/IWF may select any speed and modem type according to what it can negotiate with the remote modem on the PSTN/ISDN. The parameters User Rate and FNUR (Fixed Network User Rate), if present, has no meaning when Modem Type is autobauding type 1.
Multi self selecting speed modem: this term applies to V series modems capable of handling one or more lower speeds as a fall back position. When such a modem is requested in the call setup or call confirm message from the UE in association with a non transparent service, the MSC/IWF may select any of the speeds supported according to the negotiation with the remote modem on the PSTN/ISDN. The parameters User Rate and FNUR (Fixed Network User Rate), if present, has no meaning when Modem Type is autobauding type 1.
Unrestricted 64 kbit/s network: a digital network which has 64 kbit/s octet-structured Information Transfer Capability (ITC) with no restrictions on the contents of each octet.
restricted 64 kbit/s network: ITU-T Recommendation I.464 defines ‘"restricted 64 kbit/s transfer capability" as "64 kbit/s octet‑structured capability with the exception that an all-zero octet is not permitted". In the present document, the term "restricted 64 kbit/s network" refers not only to networks with the ITU-T Recommendation I.464 restriction but also to those in which the 8th bit of each octet is unusable for data transmission.
directly connected restricted 64 kbit/s network: restricted 64 kbit/s network which is connected directly to the MSC/IWF.
indirectly connected restricted 64 kbit/s network: restricted 64 kbit/s network which is connected to the MSC/IWF via an unrestricted 64 kbit/s network.
EDGE channel: general term referring to channels based on 8PSK modulation; i.e. TCH/F28.8, TCH/F32.0, and TCH/F43.2.
A/Gb mode: a system or a subsystem operates in A/Gb mode if an A or Gb interface is used between the radio access network and the core network.
Iu mode: a system or a subsystem operates in Iu mode if an Iu-CS or Iu-PS interface is used between the radio access network and the core network. It operates in UTRAN Iu mode if UTRAN is used as radio access network. It operates in GERAN Iu mode if GERAN is used as radio access network.
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 and the following apply:
ADPCM Adaptive Differential Pulse Coded Modulation
BS Bearer Service
DP Dial Pulse
DSS1 Digital Subscriber Signalling 1
FTM Frame Tunnelling Mode
ITC Information Transfer Capability
LE Local Exchange
NT Network Termination
NT non-transparent
PABX Private Automatic Branch Exchange
PIAFS PHS Internet Access Forum Standard
PPP Point to Point Protocol
SPC Stored Program Control
SS No.7 Signalling System No.7
T transparent
TE Terminal Equipment
TA Terminal Adaptor
TS Teleservice
TS Technical Specification
TUP Telephone User Part (of Signalling System No.7)
UNI User Network Interface