Specifications

3GPP
3GPP TS 27.007 V6.3.0 (2003-
06)
8
Release 6
Figure 1: Setup
Interface between TE and TA is intended to operate over existing serial (ITU-T Recommendation V.24) cables, infrared
link, and all link types with similar behaviour. For correct operation many of the defined commands require eight bit
data and therefore it is recommended that TE-TA link is set to eight bits/ byte mode. (For infrared operation
implementation refer informative references IrDA. For embedding AT commands and data during on-line data state
refer TIA-617/ITU-T V.80.) Interface between TA and MT is dependent on the interface in the MT.
The functional blocks shown in Figure 1, using AT commands, shall follow the principles described in the interactions
handling framework 3GPP TS 23.227 [63].
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TS 22.002: "3rd Generation Partnership Project; Bearer Services (BS) supported by a GSM
Public Land Mobile Network (PLMN)".
[2] 3GPP TS 22.003: "3rd Generation Partnership Project; Teleservices supported by a GSM Public
Land Mobile Network (PLMN)".
[3] 3GPP TS 22.081: "3rd Generation Partnership Project; Line identification supplementary services -
Stage 1".
[4] 3GPP TS 22.082: "3rd Generation Partnership Project; Call Forwarding (CF) supplementary
services - Stage 1".
[5] 3GPP TS 22.083: "3rd Generation Partnership Project; Call Waiting (CW) and Call Hold (HOLD)
supplementary services - Stage 1".
[6] 3GPP TS 22.088: "3rd Generation Partnership Project; Call Barring (CB) supplementary services -
Stage 1".
[7] 3GPP TS 23.003: "3rd Generation Partnership Project; Numbering, addressing and identification".
[8] 3GPP TS 24.008: "3rd Generation Partnership Project; Mobile Radio Interface Layer 3
specification; Core Network Protocols-Stage 3".
[9] GSM MoU SE.13, GSM MoU Permanent Reference Document SE.13: "GSM Mobile Network
Codes and Names".
[10] ITU-T Recommendation E.212: "Identification plan for land mobile stations".
[11] ITU-T Recommendation T.31: "Asynchronous facsimile DCE control, service class 1".
[12] ITU-T Recommendation T.32: "Asynchronous facsimile DCE control, service class 2".
[13] ITU-T Recommendation T.50: "International Reference Alphabet (IRA) (Formerly International
Alphabet No. 5 or IA5) - Information technology - 7-bit coded character set for information
exchange".
[14] ITU-T Draft new Recommendation V.250: "Serial asynchronous automatic dialling and control".
[15] Telecommunications Industry Association TIA IS-99: "Data Services Option Standard for
Wideband Spread Spectrum Digital Cellular System".