ETSI I-ETS 300 245-4 ed.1 (1995-02)

Integrated Services Digital Network (ISDN); Technical characteristics of telephony terminals; Part 4: Additional Equipment Interface (AEI)

T/TE 10-07 (D)

Digitalno omrežje z integriranimi storitvami (ISDN) – Tehnične karakteristike telefonskih terminalov – 4. del: Vmesnik za dodatno opremo (AEI)

General Information

• Status: Published
• Publication Date: 02-Mar-1995
• Technical Committee: TE 4 - Audiovisual and Voice Terminals
• Current Stage: 12 - Completion
• Due Date: 29-Apr-1994
• Completion Date: 03-Mar-1995
• Ref Project: SIST I-ETS 300 245-4 E1:2003 - Integrated Services Digital Network (ISDN); Technical characteristics of telephony terminals; Part 4: Additional Equipment Interface (AEI)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST I-ETS 300 245-4 E1:2003
01-december-2003
'LJLWDOQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL,6'1±7HKQLþQHNDUDNWHULVWLNH
WHOHIRQVNLKWHUPLQDORY±GHO9PHVQLN]DGRGDWQRRSUHPR$(,
Integrated Services Digital Network (ISDN); Technical characteristics of telephony
terminals; Part 4: Additional Equipment Interface (AEI)
Ta slovenski standard je istoveten z: I-ETS 300 245-4 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST I-ETS 300 245-4 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST I-ETS 300 245-4 E1:2003

---------------------- Page: 2 ----------------------

SIST I-ETS 300 245-4 E1:2003
INTERIM
EUROPEAN I-ETS 300 245-4
TELECOMMUNICATION February 1995
STANDARD
Source: ETSI TC-TE Reference: T/TE 10-07(D)
ICS: 33.080
ISDN, telephony terminals, Additional Equipment Interface
Key words:
Integrated Services Digital Network (ISDN);
Technical characteristics of telephony terminals;
Part 4: Additional Equipment Interface (AEI)
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1995. All rights reserved.
New presentation - see History box

---------------------- Page: 3 ----------------------

SIST I-ETS 300 245-4 E1:2003
Page 2
I-ETS 300 245-4: February 1995
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

---------------------- Page: 4 ----------------------

SIST I-ETS 300 245-4 E1:2003
Page 3
I-ETS 300 245-4: February 1995
Contents
Foreword .9
1 Scope .11
2 Normative references.11
3 Definitions and abbreviations .13
3.1 Definitions .13
3.2 Abbreviations .13
4 Applications and functionality .14
4.1 General .14
4.2 Applications.14
4.3 Functionality.16
4.3.1 Functionality of the X/Y-interface .16
4.3.2 Functionality of the Z /Z interfaces .16
A B
4.4 Operating modes .17
4.4.1 General.17
4.4.2 D-channel signalling .17
4.4.2.1 Outgoing call.17
4.4.2.2 Incoming call.17
4.4.3 Operating modes with X-/Y- interface .17
4.4.4 Operating modes with Z /Z - interface .18
A B
5 Physical and transmission requirements for X- and Y- interface .18
5.1 General .18
5.2 XTE-interface.20
5.2.1 General.20
5.2.2 Relative levels .20
5.2.3 Interface impedances.21
5.2.4 Variation of gain with the input level.21
5.2.5 Distortion .21
5.2.6 Attenuation/Frequency distortion of the encoding or the decoding side.21
5.2.7 Out-of-band signals.21
5.2.8 Single frequency noise from the encoding or decoding side.22
5.2.9 Noise .22
5.2.10 Group Delay .22
5.2.11 Short-circuit protection .22
5.2.12 Terminal Coupling Loss (TCL) .22
5.3 YTE-interface.23
5.3.1 General.23
5.3.2 Bit rate .23
5.3.3 Format.23
5.3.4 Sending .24
5.3.5 Receiving.24
5.4 XAE-interface.25
5.4.1 General.25
5.4.2 Sending .25
5.4.3 Receiving.26
5.5 YAE-interface.26
5.5.1 General.26
5.5.2 Bit rate .26
5.5.3 Format.27
5.5.4 Sending .27
5.5.5 Receiving.27
5.6 AEI-connector (X,Y).27

---------------------- Page: 5 ----------------------

SIST I-ETS 300 245-4 E1:2003
Page 4
I-ETS 300 245-4: February 1995
6Z /Z Interfaces Specifications . 28
A B
6.1 2-Wire Z analogue interface specification . 28
A
6.1.1 General configuration for testing Z analogue interface . 28
A
6.1.2 2-Wire Z analogue interface characteristics. 28
A
6.1.3 Voice frequency parameters of the connection between the 2-wire Z
A
interface and the digital interface of the TE and reverse . 29
6.1.4 Terminal balance return loss . 30
6.2 Z interface specification . 30
B
6.2.1 Z electrical requirements (TE output access). 30
BR
6.2.2 Z electrical requirements (TE input access) . 31
BT
6.3 Safety and protection .31
6.4 AEI connector (Z) . 31
7 Signalling protocol on the Z /Z interface . 32
A B
7.1 Significance of the signals at the Z interface . 32
B
7.1.1 At Z . 32
BR
7.1.2 At Z . 32
BT
8 Protocol of the Y-interface . 32
8.1 Model of protocol specification. 32
8.2 Layer 1 . 33
8.3 Layer 2 . 34
8.3.1 Layer 2 functions . 34
8.3.2 Structure of layer 2 messages. 34
8.3.3 Y-Message types of layer 2 . 35
8.3.4 Length indicator of layer 2. 35
8.3.5 Additional message on layer 2. 35
8.3.6 Layer 2 to layer 3 service elements . 36
8.3.7 Layer 2 timer. 36
8.3.8 Protocol principles of layer 2. 37
8.3.9 Layer 2 SDL-description . 38
8.3.10 Error handling . 41
8.4 Layer 3 . 41
8.4.1 Layer 3 functions . 41
8.4.2 Examples for layer 3 message handling. 41
8.4.2.1 Call establishment (outgoing call initiated by the AE) . 41
8.4.2.2 Call release in case of a complete established connection 42
8.4.2.3 Takeover of the current connection . 43
8.4.2.4 Incoming call . 44
8.4.2.5 Manufacturer specified applications. 45
8.4.3 Structure of layer 3 message. 46
8.4.4 Message functional definitions and contents. 46
8.4.4.1 Messages. 47
8.4.4.2 Y Setup . 48
-
8.4.4.3 Y Call answering . 49
-
8.4.4.4 Y Channel connected. 49
-
8.4.4.5 Y Channel disconnected. 49
-
8.4.4.6 Y Info. 50
-
8.4.4.7 Y Alert . 50
-
8.4.4.8 Y Call proceeding. 50
-
8.4.4.9 Y User info . 51
-
8.4.4.10 Y Transfer to TE . 51
-
8.4.4.11 Y Additional Equipment Request . 51
-
8.4.4.12 Y additional equipment acknowledge . 52
-
8.4.4.13 Y Additional Equipment Reject . 52
-
8.4.4.14 Y End . 52
-
8.4.4.15 Y Reset . 52
-
8.4.4.16 Y Terminal Active. 53
-
8.4.4.17 Y Facility. 53
-
8.4.4.18 Y Escape. 53
-
8.4.4.19 Y Disconnect. 54
-
8.4.4.20 Y Congestion Control. 54
-
8.4.5 Coding of message types . 55

---------------------- Page: 6 ----------------------

SIST I-ETS 300 245-4 E1:2003
Page 5
I-ETS 300 245-4: February 1995
8.4.6 Y Call Reference .55
-
8.4.7 Information elements.56
8.4.7.1 Coding of information elements.56
8.4.7.2 Priority.56
8.4.7.3 Manufacturer identifier.57
8.4.8 Layer 3 timer .57
8.4.9 State transition diagram .57
8.4.10 Layer 3 SDL-Description .65
8.4.11 Error handling.78
Annex A (normative): Test specification.79
A.1 Definitions of the aim of the test specification.79
A.2 Definition of the structure of the test principles .79
A.3 Definition of terms .80
A.4 Definition of special test equipment .81
A.4.1 AE and TE - simulator.81
A.4.2 Test instruments .81
A.5 General condition for testing .82
A.5.1 General .82
A.5.2 Conditions for testing Z analogue interface.83
A
A.6 Test principles .84
A.6.1 Test principles XTE (X-interface at TE).84
A.6.1.1 Relative levels .84
A.6.1.1.1 Input (TP No. 1) .84
A.6.1.1.2 Output (TP No. 2) .84
A.6.1.2 Interface impedances.85
A.6.1.2.1 Input (TP No. 3) .85
A.6.1.2.2 Output (TP No. 4) .86
A.6.1.3 Variation of gain with input level.86
A.6.1.3.1 Encoding side (TP No. 5) .86
A.6.1.3.2 Decoding side (TP No. 6) .87
A.6.1.4 Distortion .88
A.6.1.4.1 Encoding side .88
A.6.1.4.1.1 Distortion as a function of input level
(TP No. 7) .88
A.6.1.4.1.2 Distortion as a function of frequency
(7 kHz telephony) (TP No. 8) .88
A.6.1.4.2 Decoding side.89
A.6.1.4.2.1 Distortion as a function of input level
(TP No. 9) .89
A.6.1.4.2.2 Distortion as a function of frequency
(7 kHz telephony) (TP No. 10) .90
A.6.1.5 Attenuation/Frequency distortion of the encoding or decoding side.90
A.6.1.5.1 Encoding side (TP No. 11) .90
A.6.1.5.2 Decoding side (TP No. 12) .91
A.6.1.6 Out-of-band signals.92
A.6.1.6.1 Discrimination against out-of-band input signals (TP No.
13).92
A.6.1.6.2 Spurious out-of-band signals at the output (TP No. 14) .92
A.6.1.7 Single frequency noise .93
A.6.1.7.1 Encoding side (TP No. 15) .93
A.6.1.7.2 Decoding side (TP No. 16) .94
A.6.1.8 Noise .95
A.6.1.8.1 Input (TP No. 17) .95
A.6.1.8.2 Output (TP No. 18) .95
A.6.1.9 Group delay.96
A.6.1.9.1 Encoding side (TP No. 19) .96

---------------------- Page: 7 ----------------------

SIST I-ETS 300 245-4 E1:2003
Page 6
I-ETS 300 245-4: February 1995
A.6.1.9.2 Decoding side (TP No. 20). 97
A.6.1.10 Short circuit protection (TP No. 21) . 99
A.6.1.11 Terminal Coupling Loss (TCL) (TP No. 22). 99
A.6.2 Test principles YTE (Y-interface at TE). 100
A.6.2.1 Bit rate . 100
A.6.2.1.1 Transmitting bit rate (TP No. 23). 100
A.6.2.1.2 Receiving bit rate (TP No. 24). 100
A.6.2.2 Format (TP No. 25). 101
A.6.2.3 Sending. 102
A.6.2.3.1 Active state, with load (TP No. 26). 102
A.6.2.3.2 Active state, without load (TP No. 27). 102
A.6.2.3.3 Idle state (TP No. 28). 103
A.6.2.3.4 Output resistance (TP No. 29) . 103
A.6.2.4 Receiving . 104
A.6.2.4.1 Short-circuit current (TP No. 30). 104
A.6.2.4.2 Open-circuit voltage (TP No. 31) . 105
A.6.3 Test principles XAE (X-interface at AE) . 106
A.6.3.1 Sending. 106
A.6.3.1.1 Output level (TP No. 32) . 106
A.6.3.1.2 Active mode output impedance (TP No. 33). 106
A.6.3.1.3 Idle mode insertion loss (TP No. 34). 107
A.6.3.1.4 Noise (TP No. 35) . 107
A.6.3.2 Receiving . 108
A.6.3.2.1 Input impedance (TP No. 36). 108
A.6.4 Test principles YAE (Y-interface at AE) . 108
A.6.4.1 Bit rate . 108
A.6.4.1.1 Transmitting bit rate (TP No. 37). 108
A.6.4.1.2 Receiving bit rate (TP No. 38). 109
A.6.4.2 Format (TP No. 39). 109
A.6.4.3 Sending. 110
A.6.4.3.1 Active state (TP No. 40). 110
A.6.4.3.2 Idle state (TP No. 41). 111
A.6.4.4 Receiving . 111
A.6.4.4.1 Active state (TP No. 42). 111
A.6.4.4.2 Idle state (TP No. 43). 112
A.6.5 Test principles Z . 112
A
A.6.5.1 2-wire Z analogue interface requirements testing . 112
A
A.6.5.1.1 Return loss (TP No. 44) . 112
A.6.5.1.2 Superimposed DC voltage (TP No. 45) . 113
A.6.5.1.3 Maximum loop current (TP No. 46). 114
A.6.5.1.4 Loop threshold current (TP No. 47) . 114
A.6.5.2 Voice frequency parameters of the connection between the 2-wire Z
A
interface and the digital interface of the TE and reverse . 115
A.6.5.2.1 Transmission loss (sending direction) (TP No. 48). 115
A.6.5.2.2 Transmission loss (receiving direction) (TP No. 49). 116
A.6.5.2.3 Variation of gain with input level (sending direction) (TP
No. 50) . 117
A.6.5.2.4 Variation of gain with input level (receiving direction) (TP
No. 51) . 118
A.6.5.2.5 Loss distortion with frequency (sending direction) (TP No.
52). 119
A.6.5.2.6 Loss distortion with frequency (receiving direction) (TP
No. 53) . 120
A.6.5.2.7 Discrimination against out of band signals applied to the
Z analogue interface (TP No. 54) . 121
A
A.6.5.2.8 Spurious out of band received at the Z analogue
A
interface (TP No. 55). 122
A.6.5.2.9 Total distortion, including quantizing distortion (sending
direction) (TP No. 56). 123
A.6.5.2.10 Total distortion including quantizing distortion (receiving
direction) (TP No. 57). 124
A.6.5.2.11 Weighted noise at S digital interface (TP No. 58). 125
A.6.5.2.12 Weighted noise at Z analogue interface (TP No. 59) . 126
A

---------------------- Page: 8 ----------------------

SIST I-ETS 300 245-4 E1:2003
Page 7
I-ETS 300 245-4: February 1995
A.6.5.3 S/T digital interface testing .127
A.6.5.3.1 Terminal balance return loss (TP No. 60) .127
A.6.6 Test principles Z (B-interface at TE).128
B
A.6.6.1 Z electrical requirements (TE output access).128
BR
A.6.6.1.1 Active state without load (TP No. 61) .128
A.6.6.1.2 Active state with load (TP No. 62) .128
A.6.6.1.3 Idle state with load (TP No. 63) .129
A.6.6.2 Z electrical requirements/TE input access.129
BT
A.6.6.2.1 Active state control voltage (TP No. 64) .129
A.6.6.2.2 Active state input current (TP No. 65) .130
A.6.6.2.3 Idle state control voltage (TP No. 66) .130
A.6.6.2.4 Idle state driving current (TP No. 67).130
Annex B (informative): Bibliography.131
History.132

---------------------- Page: 9 ----------------------

SIST I-ETS 300 245-4 E1:2003
Page 8
I-ETS 300 245-4: February 1995
Blank page

---------------------- Page: 10 ----------------------

SIST I-ETS 300 245-4 E1:2003
Page 9
I-ETS 300 245-4: February 1995
Foreword
Part 4 of this Interim European Telecommunication Standard (I-ETS) was produced by the Terminal
Equipment (TE) Technical Committee of the European Telecommunications Standards Institute (ETSI).
An ETSI standard may be given I-ETS status either because it is regarded as a provisional solution ahead
of a more advanced standard, or because it is immature and requires a "trial period". The life of an I-ETS
is limited to three years after which it can be converted into a European Telecommunication Standard
(ETS), have it's life extended for a further two years, be replaced by a new version or, be withdrawn.
This is the fourth Part of an I-ETS which is currently intended to comprise eight Parts.
This I-ETS specifies technical characteristics for Integrated Services Digital Network (ISDN) telephony
terminals as described in the scope of this I-ETS. The characteristics are additional to type approval
requirements to which the terminal equipment is subject.
...