ETSI EN 300 392-5 V2.7.1 (2020-04)

ETSI EN 300 392-5 V2.7.1 (2020-04)






EUROPEAN STANDARD
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D) and Direct Mode Operation (DMO);
Part 5: Peripheral Equipment Interface (PEI)

---------------------- Page: 1 ----------------------
2 ETSI EN 300 392-5 V2.7.1 (2020-04)



Reference
REN/TCCE-03266
Keywords
data, interface, TETRA, V+D, voice
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2020.
All rights reserved.

DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.

3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners.
®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 ETSI EN 300 392-5 V2.7.1 (2020-04)
Contents
Intellectual Property Rights . 22
Foreword . 22
Modal verbs terminology . 23
1 Scope . 24
2 References . 24
2.1 Normative references . 24
2.2 Informative references . 26
3 Definition of terms, symbols and abbreviations . 26
3.1 Terms . 26
3.2 Symbols . 26
3.3 Abbreviations . 27
4 Overview of TETRA PEI . 31
4.1 Introduction . 31
4.2 Protocol architecture. 31
4.3 Context model . 32
4.4 Void . 35
4.5 SDS Message stacks . 35
4.5.0 General on SDS Message stacks . 35
4.5.1 Status message texts. 35
4.5.2 SDS 1 message texts . 35
4.5.3 Status and SDS types 1, 2 and 3 . 36
4.5.4 SDS type 4 . 36
4.6 Phone books . 36
4.7 Reserved status values considerations . 36
4.8 SDS-TL considerations . 37
4.9 AT commands . 38
4.9.1 General on AT commands . 38
4.9.2 AT command state . 39
4.9.3 AT circuit mode data state . 40
4.9.4 TNP1 and packet data state . 40
4.9.5 Transitions between states . 40
4.9.5.1 Transition from AT command state to AT circuit mode data state . 40
4.9.5.2 Transition from AT circuit mode data state to AT command state . 41
4.9.5.3 Transition from AT command state to TNP1 or packet data state . 41
4.9.5.4 Transition from TNP1 and packet data state to AT command state . 41
4.10 TNP1 and IP network layer . 41
4.10.1 General operation . 41
4.10.2 IP addressing . 42
4.10.3 Local mode . 42
4.10.4 Wide mode . 42
4.11 TNP1 operation . 43
4.12 Link start up at the MT . 44
5 Physical layer . 44
5.1 General on physical layer . 44
5.2 Physical layer for V.24/V.28 . 44
5.2.1 Electrical characteristics for V.24/V.28 . 44
5.2.2 Physical connection . 44
5.2.3 Character format . 45
5.2.4 Data transmission rate for V.24/V.28 . 46
5.3 Wire-line high rate connectivity technologies . 46
5.3.1 General . 46
5.3.2 Universal Serial Bus . 47
5.3.3 USB On-The-Go . 47
5.4 Wireless high rate connectivity . 48
ETSI

---------------------- Page: 3 ----------------------
4 ETSI EN 300 392-5 V2.7.1 (2020-04)
5.4.1 General . 48
5.4.2 Wireless Security . 48
5.4.3 Certified Wireless USB . 48
5.4.4 Bluetooth . 48
6 AT command set . 49
6.1 General on AT command set . 49
6.2 Limitations . 49
6.3 SDS user data . 49
6.4 AT command syntax . 50
6.4.1 General on AT command syntax . 50
6.4.2 Command line . 50
6.4.2.0 Command line structure . 50
6.4.2.1 Prefix . 50
6.4.2.2 Body . 50
6.4.2.3 Termination Character . 51
6.4.2.4 Concatenating extended commands . 51
6.4.2.5 Multiline extended commands . 51
6.4.3 Command types . 51
6.4.4 Parameters. 52
6.4.5 AT command examples . 52
6.4.6 Information responses and result codes . 53
6.4.6.1 General on information responses and result codes . 53
6.4.6.2 Information Responses . 54
6.4.6.3 Result Code . 54
6.4.6.4 AT result examples in verbose mode . 54
6.4.6.5 AT result examples in numeric mode. 56
6.4.6.6 Aborting information results and result codes. 57
6.4.6.7 Unsolicited nested responses . 57
6.4.7 Handling of unknown parameters . 60
6.5 Existing V.250 commands for call control . 60
6.5.1 Commands . 60
6.5.2 Result Codes . 61
6.5.3 Dialled string and user identity . 61
6.6 Existing V.250 commands for PEI control . 61
6.6a Modified V.250 commands for PEI control . 62
6.6a.1 General on modified V.250 commands for PEI control. 62
6.6a.2 Line termination character: S3 . 62
6.6a.2.1 General on S3 . 62
6.6a.2.2 Description . 62
6.6a.2.3 S3 set syntax. 62
6.6a.2.4 S3 read syntax . 62
6.6a.2.5 S3 read result code text . 63
6.6a.2.6 S3 test syntax . 63
6.6a.2.7 S3 test result syntax . 63
6.6a.3 Response formatting character: S4 . 63
6.6a.3.1 General on S4 . 63
6.6a.3.2 Description . 63
6.6a.3.3 S4 set syntax. 63
6.6a.3.4 S4 read syntax . 63
6.6a.3.5 S4 read result code text . 63
6.6a.3.6 S4 test syntax . 64
6.6a.3.7 S4 test result syntax . 64
6.6a.4 Line editing character: S5 . 64
6.6a.4.1 General on S5 . 64
6.6a.4.2 Description . 64
6.6a.4.3 S5 set syntax. 64
6.6a.4.4 S5 read syntax . 64
6.6a.4.5 S5 read result code text . 64
6.6a.4.6 S5 test syntax . 64
6.6a.4.7 S5 test result syntax . 65
6.6a.5 Echo: E . 65
ETSI

---------------------- Page: 4 ----------------------
5 ETSI EN 300 392-5 V2.7.1 (2020-04)
6.6a.5.1 General on E. 65
6.6a.5.2 Description . 65
6.6a.5.3 E set syntax . 65
6.6a.5.4 E read syntax . 65
6.6a.5.5 E read result code text . 65
6.6a.5.6 E test syntax . 65
6.6a.5.7 E test result syntax . 65
6.6a.6 Result code suppression: Q . 66
6.6a.6.1 General on Q . 66
6.6a.6.2 Description . 66
6.6a.6.3 Q set syntax . 66
6.6a.6.4 Q read syntax . 66
6.6a.6.5 Q read result code text . 66
6.6a.6.6 Q test syntax . 66
6.6a.6.7 Q test result syntax . 66
6.6a.7 MT response format: V . 66
6.6a.7.1 General on V . 66
6.6a.7.2 Description . 66
6.6a.7.3 V set syntax . 67
6.6a.7.4 V read syntax . 67
6.6a.7.5 V read result code text . 67
6.6a.7.6 V test syntax . 67
6.6a.7.7 V test result syntax . 67
6.6a.8 Circuit 109 (DCD) behavior: &C . 67
6.6a.8.1 General on &C . 67
6.6a.8.2 Description . 67
6.6a.8.3 &C set syntax . 67
6.6a.8.4 &C read syntax . 67
6.6a.8.5 &C read result code text . 68
6.6a.8.6 &C test syntax . 68
6.6a.8.7 &C test result syntax . 68
6.6a.9 Circuit 108/2 (DTR) behavior: &D . 68
6.6a.9.1 General on &D . 68
6.6a.9.2 Description . 68
6.6a.9.3 &D set syntax . 68
6.6a.9.4 &D read syntax . 68
6.6a.9.5 &D read result code text . 68
6.6a.9.6 &D test syntax . 69
6.6a.9.7 &D test result syntax . 69
6.6a.10 PEI data rate: +IPR . 69
6.6a.10.1 General on +IPR . 69
6.6a.10.2 Description . 69
6.6a.10.3 +IPR set syntax . 69
6.6a.10.4 +IPR read syntax . 69
6.6a.10.5 +IPR read result code text . 69
6.6a.10.6 +IPR test syntax . 69
6.6a.10.7 +IPR test result syntax . 69
6.7 Existing V.250 commands for generic MT control . 70
6.7a Modified V.250 commands for generic MT control . 70
6.7a.1 General on modified V.250 commands for generic MT control . 70
6.7a.2 Full factory defaults Z. 70
6.7a.2.1 General on full factory defaults Z . 70
6.7a.2.2 Description . 70
6.7a.2.3 Z execution syntax . 71
6.7a.2.4 Z test syntax .
...

Draft ETSI EN 300 392-5 V2.7.0 (2019-08)






EUROPEAN STANDARD
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D) and Direct Mode Operation (DMO);
Part 5: Peripheral Equipment Interface (PEI)

---------------------- Page: 1 ----------------------
2 Draft ETSI EN 300 392-5 V2.7.0 (2019-08)



Reference
REN/TCCE-03266
Keywords
data, interface, TETRA, V+D, voice
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2019.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
TM TM
3GPP and LTE are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners.
®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI

---------------------- Page: 2 ----------------------
3 Draft ETSI EN 300 392-5 V2.7.0 (2019-08)
Contents
Intellectual Property Rights . 22
Foreword . 22
Modal verbs terminology . 22
1 Scope . 24
2 References . 24
2.1 Normative references . 24
2.2 Informative references . 26
3 Symbols and abbreviations . 26
3.1 Symbols . 26
3.2 Abbreviations . 27
4 Overview of TETRA PEI . 31
4.1 Introduction . 31
4.2 Protocol architecture. 31
4.3 Context model . 32
4.4 Void . 35
4.5 SDS Message stacks . 35
4.5.0 General on SDS Message stacks . 35
4.5.1 Status message texts. 35
4.5.2 SDS 1 message texts . 35
4.5.3 Status and SDS types 1, 2 and 3 . 35
4.5.4 SDS type 4 . 36
4.6 Phone books . 36
4.7 Reserved status values considerations . 36
4.8 SDS-TL considerations . 36
4.9 AT commands . 37
4.9.1 General on AT commands . 37
4.9.2 AT command state . 39
4.9.3 AT circuit mode data state . 39
4.9.4 TNP1 and packet data state . 40
4.9.5 Transitions between states . 40
4.9.5.1 Transition from AT command state to AT circuit mode data state . 40
4.9.5.2 Transition from AT circuit mode data state to AT command state . 40
4.9.5.3 Transition from AT command state to TNP1 or packet data state . 41
4.9.5.4 Transition from TNP1 and packet data state to AT command state . 41
4.10 TNP1 and IP network layer . 41
4.10.1 General operation . 41
4.10.2 IP addressing . 41
4.10.3 Local mode . 42
4.10.4 Wide mode . 42
4.11 TNP1 operation . 42
4.12 Link start up at the MT . 43
5 Physical layer . 43
5.1 General on physical layer . 43
5.2 Physical layer for V.24/V.28 . 44
5.2.1 Electrical characteristics for V.24/V.28 . 44
5.2.2 Physical connection . 44
5.2.3 Character format . 45
5.2.4 Data transmission rate for V.24/V.28 . 45
5.3 Wire-line high rate connectivity technologies . 45
5.3.1 General . 45
5.3.2 Universal Serial Bus . 46
5.3.3 USB On-The-Go . 47
5.4 Wireless high rate connectivity . 47
5.4.1 General . 47
ETSI

---------------------- Page: 3 ----------------------
4 Draft ETSI EN 300 392-5 V2.7.0 (2019-08)
5.4.2 Wireless Security . 47
5.4.3 Certified Wireless USB . 48
5.4.4 Bluetooth . 48
6 AT command set . 48
6.1 General on AT command set . 48
6.2 Limitations . 49
6.3 SDS user data . 49
6.4 AT command syntax . 50
6.4.1 General on AT command syntax . 50
6.4.2 Command line . 50
6.4.2.0 Command line structure . 50
6.4.2.1 Prefix . 50
6.4.2.2 Body . 50
6.4.2.3 Termination Character . 50
6.4.2.4 Concatenating extended commands . 50
6.4.2.5 Multiline extended commands . 50
6.4.3 Command types . 51
6.4.4 Parameters. 52
6.4.5 AT command examples . 52
6.4.6 Information responses and result codes . 53
6.4.6.1 General on information responses and result codes . 53
6.4.6.2 Information Responses . 53
6.4.6.3 Result Code . 53
6.4.6.4 AT result examples in verbose mode . 54
6.4.6.5 AT result examples in numeric mode. 56
6.4.6.6 Aborting information results and result codes. 57
6.4.6.7 Unsolicited nested responses . 57
6.4.7 Handling of unknown parameters . 59
6.5 Existing V.250 commands for call control . 60
6.5.1 Commands . 60
6.5.2 Result Codes . 60
6.5.3 Dialled string and user identity . 61
6.6 Existing V.250 commands for PEI control . 61
6.6a Modified V.250 commands for PEI control . 62
6.6a.1 General on modified V.250 commands for PEI control. 62
6.6a.2 Line termination character: S3 . 62
6.6a.2.1 General on S3 . 62
6.6a.2.2 Description . 62
6.6a.2.3 S3 set syntax. 62
6.6a.2.4 S3 read syntax . 62
6.6a.2.5 S3 read result code text . 62
6.6a.2.6 S3 test syntax . 63
6.6a.2.7 S3 test result syntax . 63
6.6a.3 Response formatting character: S4 . 63
6.6a.3.1 General on S4 . 63
6.6a.3.2 Description . 63
6.6a.3.3 S4 set syntax. 63
6.6a.3.4 S4 read syntax . 63
6.6a.3.5 S4 read result code text . 63
6.6a.3.6 S4 test syntax . 63
6.6a.3.7 S4 test result syntax . 63
6.6a.4 Line editing character: S5 . 64
6.6a.4.1 General on S5 . 64
6.6a.4.2 Description . 64
6.6a.4.3 S5 set syntax. 64
6.6a.4.4 S5 read syntax . 64
6.6a.4.5 S5 read result code text . 64
6.6a.4.6 S5 test syntax . 64
6.6a.4.7 S5 test result syntax . 64
6.6a.5 Echo: E . 64
6.6a.5.1 General on E. 64
ETSI

---------------------- Page: 4 ----------------------
5 Draft ETSI EN 300 392-5 V2.7.0 (2019-08)
6.6a.5.2 Description . 65
6.6a.5.3 E set syntax . 65
6.6a.5.4 E read syntax . 65
6.6a.5.5 E read result code text . 65
6.6a.5.6 E test syntax . 65
6.6a.5.7 E test result syntax . 65
6.6a.6 Result code suppression: Q . 65
6.6a.6.1 General on Q . 65
6.6a.6.2 Description . 65
6.6a.6.3 Q set syntax . 65
6.6a.6.4 Q read syntax . 66
6.6a.6.5 Q read result code text . 66
6.6a.6.6 Q test syntax . 66
6.6a.6.7 Q test result syntax . 66
6.6a.7 MT response format: V . 66
6.6a.7.1 General on V . 66
6.6a.7.2 Description . 66
6.6a.7.3 V set syntax . 66
6.6a.7.4 V read syntax . 66
6.6a.7.5 V read result code text . 66
6.6a.7.6 V test syntax . 67
6.6a.7.7 V test result syntax . 67
6.6a.8 Circuit 109 (DCD) behavior: &C . 67
6.6a.8.1 General on &C . 67
6.6a.8.2 Description . 67
6.6a.8.3 &C set syntax . 67
6.6a.8.4 &C read syntax . 67
6.6a.8.5 &C read result code text . 67
6.6a.8.6 &C test syntax . 67
6.6a.8.7 &C test result syntax . 67
6.6a.9 Circuit 108/2 (DTR) behavior: &D . 68
6.6a.9.1 General on &D . 68
6.6a.9.2 Description . 68
6.6a.9.3 &D set syntax . 68
6.6a.9.4 &D read syntax . 68
6.6a.9.5 &D read result code text . 68
6.6a.9.6 &D test syntax . 68
6.6a.9.7 &D test result syntax . 68
6.6a.10 PEI data rate: +IPR . 68
6.6a.10.1 General on +IPR . 68
6.6a.10.2 Description . 69
6.6a.10.3 +IPR set syntax . 69
6.6a.10.4 +IPR read syntax . 69
6.6a.10.5 +IPR read result code text . 69
6.6a.10.6 +IPR test syntax . 69
6.6a.10.7 +IPR test result syntax . 69
6.7 Existing V.250 commands for generic MT control . 69
6.7a Modified V.250 commands for generic MT control . 70
6.7a.1 General on modified V.250 commands for generic MT control . 70
6.7a.2 Full factory defaults Z. 70
6.7a.2.1 General on full factory defaults Z . 70
6.7a.2.2 Description . 70
6.7a.2.3 Z execution syntax . 70
6.7a.2.4 Z test syntax .
...

SLOVENSKI STANDARD
oSIST prEN 300 392-5 V2.7.0:2019
01-november-2019
Prizemni snopovni radio (TETRA) - Govor in podatki (V+D) in neposredni način
zveze (DMO) - 5. del: Vmesnik periferne opreme (PEI)
Terrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) and Direct Mode Operation
(DMO) - Part 5: Peripheral Equipment Interface (PEI)
Ta slovenski standard je istoveten z: ETSI EN 300 392-5 V2.7.0 (2019-08)
ICS:
33.070.10 Prizemni snopovni radio Terrestrial Trunked Radio
(TETRA) (TETRA)
oSIST prEN 300 392-5 V2.7.0:2019 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 300 392-5 V2.7.0:2019

---------------------- Page: 2 ----------------------
oSIST prEN 300 392-5 V2.7.0:2019
Draft ETSI EN 300 392-5 V2.7.0 (2019-08)






EUROPEAN STANDARD
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D) and Direct Mode Operation (DMO);
Part 5: Peripheral Equipment Interface (PEI)

---------------------- Page: 3 ----------------------
oSIST prEN 300 392-5 V2.7.0:2019
 2 Draft ETSI EN 300 392-5 V2.7.0 (2019-08)



Reference
REN/TCCE-03266
Keywords
data, interface, TETRA, V+D, voice
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: +33 4 92 94 42 00  Fax: +33 4 93 65 47 16

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
The present document can be downloaded from:
http://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the
print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying
and microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2019.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are trademarks of ETSI registered for the benefit of its Members.
TM TM
3GPP and LTE are trademarks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and
of the oneM2M Partners.
®
GSM and the GSM logo are trademarks registered and owned by the GSM Association.
ETSI

---------------------- Page: 4 ----------------------
oSIST prEN 300 392-5 V2.7.0:2019
 3 Draft ETSI EN 300 392-5 V2.7.0 (2019-08)
Contents
Intellectual Property Rights . 22
Foreword . 22
Modal verbs terminology . 22
1 Scope . 24
2 References . 24
2.1 Normative references . 24
2.2 Informative references . 26
3 Symbols and abbreviations . 26
3.1 Symbols . 26
3.2 Abbreviations . 27
4 Overview of TETRA PEI . 31
4.1 Introduction . 31
4.2 Protocol architecture. 31
4.3 Context model . 32
4.4 Void . 35
4.5 SDS Message stacks . 35
4.5.0 General on SDS Message stacks . 35
4.5.1 Status message texts. 35
4.5.2 SDS 1 message texts . 35
4.5.3 Status and SDS types 1, 2 and 3 . 35
4.5.4 SDS type 4 . 36
4.6 Phone books . 36
4.7 Reserved status values considerations . 36
4.8 SDS-TL considerations . 36
4.9 AT commands . 37
4.9.1 General on AT commands . 37
4.9.2 AT command state . 39
4.9.3 AT circuit mode data state . 39
4.9.4 TNP1 and packet data state . 40
4.9.5 Transitions between states . 40
4.9.5.1 Transition from AT command state to AT circuit mode data state . 40
4.9.5.2 Transition from AT circuit mode data state to AT command state . 40
4.9.5.3 Transition from AT command state to TNP1 or packet data state . 41
4.9.5.4 Transition from TNP1 and packet data state to AT command state . 41
4.10 TNP1 and IP network layer . 41
4.10.1 General operation . 41
4.10.2 IP addressing . 41
4.10.3 Local mode . 42
4.10.4 Wide mode . 42
4.11 TNP1 operation . 42
4.12 Link start up at the MT . 43
5 Physical layer . 43
5.1 General on physical layer . 43
5.2 Physical layer for V.24/V.28 . 44
5.2.1 Electrical characteristics for V.24/V.28 . 44
5.2.2 Physical connection . 44
5.2.3 Character format . 45
5.2.4 Data transmission rate for V.24/V.28 . 45
5.3 Wire-line high rate connectivity technologies . 45
5.3.1 General . 45
5.3.2 Universal Serial Bus . 46
5.3.3 USB On-The-Go . 47
5.4 Wireless high rate connectivity . 47
5.4.1 General . 47
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oSIST prEN 300 392-5 V2.7.0:2019
 4 Draft ETSI EN 300 392-5 V2.7.0 (2019-08)
5.4.2 Wireless Security . 47
5.4.3 Certified Wireless USB . 48
5.4.4 Bluetooth . 48
6 AT command set . 48
6.1 General on AT command set . 48
6.2 Limitations . 49
6.3 SDS user data . 49
6.4 AT command syntax . 50
6.4.1 General on AT command syntax . 50
6.4.2 Command line . 50
6.4.2.0 Command line structure . 50
6.4.2.1 Prefix . 50
6.4.2.2 Body . 50
6.4.2.3 Termination Character . 50
6.4.2.4 Concatenating extended commands . 50
6.4.2.5 Multiline extended commands . 50
6.4.3 Command types . 51
6.4.4 Parameters. 52
6.4.5 AT command examples . 52
6.4.6 Information responses and result codes . 53
6.4.6.1 General on information responses and result codes . 53
6.4.6.2 Information Responses . 53
6.4.6.3 Result Code . 53
6.4.6.4 AT result examples in verbose mode . 54
6.4.6.5 AT result examples in numeric mode. 56
6.4.6.6 Aborting information results and result codes. 57
6.4.6.7 Unsolicited nested responses . 57
6.4.7 Handling of unknown parameters . 59
6.5 Existing V.250 commands for call control . 60
6.5.1 Commands . 60
6.5.2 Result Codes . 60
6.5.3 Dialled string and user identity . 61
6.6 Existing V.250 commands for PEI control . 61
6.6a Modified V.250 commands for PEI control . 62
6.6a.1 General on modified V.250 commands for PEI control. 62
6.6a.2 Line termination character: S3 . 62
6.6a.2.1 General on S3 . 62
6.6a.2.2 Description . 62
6.6a.2.3 S3 set syntax. 62
6.6a.2.4 S3 read syntax . 62
6.6a.2.5 S3 read result code text . 62
6.6a.2.6 S3 test syntax . 63
6.6a.2.7 S3 test result syntax . 63
6.6a.3 Response formatting character: S4 . 63
6.6a.3.1 General on S4 . 63
6.6a.3.2 Description . 63
6.6a.3.3 S4 set syntax. 63
6.6a.3.4 S4 read syntax . 63
6.6a.3.5 S4 read result code text . 63
6.6a.3.6 S4 test syntax . 63
6.6a.3.7 S4 test result syntax . 63
6.6a.4 Line editing character: S5 . 64
6.6a.4.1 General on S5 . 64
6.6a.4.2 Description . 64
6.6a.4.3 S5 set syntax. 64
6.6a.4.4 S5 read syntax . 64
6.6a.4.5 S5 read result code text . 64
6.6a.4.6 S5 test syntax . 64
6.6a.4.7 S5 test result syntax . 64
6.6a.5 Echo: E . 64
6.6a.5.1 General on E. 64
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oSIST prEN 300 392-5 V2.7.0:2019
 5 Draft ETSI EN 300 392-5 V2.7.0 (2019-08)
6.6a.5.2 Description . 65
6.6a.5.3 E set syntax . 65
6.6a.5.4 E read syntax . 65
6.6a.5.5 E read result code text . 65
6.6a.5.6 E test syntax . 65
6.6a.5.7 E test result syntax . 65
6.6a.6 Result code suppression: Q . 65
6.6a.6.1 General on Q . 65
6.6a.6.2 Description . 65
6.6a.6.3 Q set syntax . 65
6.6a.6.4 Q read syntax . 66
6.6a.6.5 Q read result code text . 66
6.6a.6.6 Q test syntax . 66
6.6a.6.7 Q test result syntax . 66
6.6a.7 MT response format: V . 66
6.6a.7.1 General on V . 66
6.6a.7.2 Description . 66
6.6a.7.3 V set syntax . 66
6.6a.7.4 V read syntax . 66
6.6a.7.5 V read result code text . 66
6.6a.7.6 V test syntax . 67
6.6a.7.7 V test result syntax . 67
6.6a.8 Circuit 109 (DCD) behavior: &C . 67
6.6a.8.1 General on &C . 67
6.6a.8.2 Description . 67
6.6a.8.3 &C set syntax . 67
6.6a.8.4 &C read syntax . 67
6.6a.8.5 &C read result code text . 67
6.6a.8.6 &C test syntax . 67
6.6a.8.7 &C test result syntax . 67
6.6a.9 Circuit 108/2 (DTR) behavior: &D . 68
6.6a.9.1 General on &D . 68
6.6a.9.2 Description . 68
6.6a.9.3 &D set syntax . 68
6.6a.9.4 &D read syntax . 68
6.6a.9.5 &D read result code text . 68
6.6a.9.6 &D test syntax . 68
6.6a.9.7 &D test result syntax . 68
6.6a.10 PEI data rate: +IPR . 68
6.6a.10.1 General on +IPR . 68
6.6a.10.2 Description . 69
6.6a.10.3 +IPR set syntax . 69
6.6a.10.4 +IPR read syntax . 69
6.6a.10.5 +IPR read result code text . 69
6.6a.10.6 +IPR test syntax . 69
6.6a.10.7 +IPR test result syntax . 69
6.7 Existing V.250 commands for generic MT control . 69
6.7a Modified V.250 commands for generic MT control .
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