ETSI ETS 300 011/A2 ed.1 (1996-03)

SLOVENSKI STANDARD
SIST ETS 300 011/A2 E1:2003
01-december-2003
'LJLWDOQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL,6'1±3ULPDUQLYPHVQLNXSRUDEQLN
RPUHåMH±6SHFLILNDFLMDSUYHSODVWLLQQDþHODSUHVNXãDQMD
Integrated Services Digital Network (ISDN); Primary rate user-network interface; Layer 1
specification and test principles
Ta slovenski standard je istoveten z: ETS 300 011/A2 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ETS 300 011/A2 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 011/A2 E1:2003
ETS 300 011
AMENDMENT A2
March 1996
Source: ETSI TC-TM Reference: RE/TM-03015
ICS: 33.080
ISDN, user-network interface, testing
Key words:
This amendment A2 modifies
the European Telecommunication Standard ETS 300 011 (1992)
Integrated Services Digital Network (ISDN);
Primary rate user-network interface;
Layer 1 specification and test principles
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 - secretariat@etsi.fr
X.400: Internet:
Tel.: +33 92 94 42 00 - Fax: +33 93 65 47 16
*
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 1996. All rights reserved.

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ETS 300 011: April 1992/A2: March 1996
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.

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Foreword
This amendment to ETS 300 011 (1992) has been produced by the Transmission and Multiplexing (TM)
Technical Committee of the European Telecommunications Standards Institute (ETSI).
This second amendment incorporates the changes introduced by Amendment 1 (1994) to ETS 300 011.
Newly introduced modifications are indicated by a revision bar located at the left margin.
This second amendment adds a new annex F and related references, definitions and abbreviations to
ETS 300 011.
Transposition dates
Date of adoption of this amendment: 22 September 1995
Date of latest announcement of this amendment (doa): 30 June 1996
Date of latest publication or endorsement of this amendment (dop/e): 31 December 1996
Date of withdrawal of any conflicting National Standard (dow): 31 December 1996
Amendments
Page 12, clause 2
Add the following references to the Normative references clause (clause 2):
[16] CCITT Recommendation I.112 (1988): "Vocabulary of terms for ISDNs".
[17] CCITT Recommendation Q.9 (1988): "Vocabulary of switching and signalling
terms".
[18] ISO/IEC 9646-1 (1991): "OSI Conformance Testing Methodology and
Framework Part 1: General Concepts".
[19] ISO/IEC 9646-2 (1991): "OSI Conformance Testing Methodology and
Framework Part 2: Abstract Test Suite Specification".
[20] ISO/IEC 9646-5 (1991): "OSI Conformance Testing Methodology and
Framework Part 5: Requirements on test laboratories and clients for the
conformance assessment process".
Page 13, clause 3
Add the following definitions to the definitions clause (clause 3):
Integrated Services Digital Network (ISDN): See CCITT Recommendation I.112 [16], § 2.3,
definition 308.
basic access: See CCITT Recommendation Q.9 [17], § 1, definition 1551.
Protocol Implementation Conformance Statement (PICS): See ISO/IEC 9646-1 [18], § 3.4.6.

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Page 14, clause 4
Add the following abbreviations to the abbreviations clause (clause 4):
HDLC High level Data Link Control
IUT Implementation Under Test
PCTR Protocol Conformance Test Report
PICS Protocol Implementation Conformance Statement
PIXIT Protocol Implementation eXtra Information for Testing
RSE Remote Single layer Embedded
SCS System Conformance Statement
SCTR System Conformance Test Report
Page 17, table 1, table entry 3.4.6
Replace the text "" by the following:
Clause/ Title/comment Statement
subclause
3.4.6 State tables N
the following:
NOTE b): The primitives MPH-AI,
PH-AI and MPH-DI shall only be
issued when the relevant condition
persists. The persistency check
procedure is defined in
table 1/I.431, § 5.9.3.2.3.
Add a new NOTE d) to table 3/I.431:
NOTE d): The primitives MPH-AI,
PH-AI and MPH-DI shall only be
issued when the relevant condition
persists. The persistency check
procedure is defined in
table 1/I.431, § 5.9.3.3.3.>
Page 18, table 1, table entry 5.3
Add the following text to the end of the table entry for 5.3:
In order to limit the impact on the
service performance following a loss
of clock synchronization, the
maximum time for resynchronization
to network clock shall be less than
30 seconds, with the frequency
deviation applied to the input port
limited to ± 1 ppm.
5.4 Jitter I

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Pages 73 and 74, subclause C.4.4, "Results:"
Replace the text of subclause C.4.4, "Results:" with the following (modifies stimulus 7 and 8 only):
Results: As listed below.
STIMULUS             MONITOR              COMMENT
FRAME B              (see *)
  #               NOF
/FAS,BIT 2 = 1,/FAS,BIT 2 = 1
/Fas,BIT 2 = 1          RAI                Initial condition
MF A               NOF
4 X MF B             RAI                No multiframe alignment
MF A               NOF
37 X MF B            NOF, transition to RAI and     2 MFAS within 8ms in
                 back to NOF (see **)        the limit of 100ms
MF A, MF B, MF A, MFB, MFA, MFB  NOF
MF B               NOF
  # 251             Stable NOF             No RAI 500ms after a loss of
                                   multiframe alignment
/FAS,BIT 2 = 1,/FAS,BIT 2 = 1
/FAS,BIT 2 = 1          RAI                Initial condition
MF B               NOF                Correct frame alignment but
                                   not multiframe alignment
  # 250                               No multiframe alignment
MF B               RAI                within 500ms
MF A, 4 X MF B          RAI
MF A, 2 X MF B, MF A                         Undefined condition
MF A, 2 X MF B, 2 X MF A     NOF                Multiframe alignment reached
MF B, MF A            NOF
  #
* This stimulus shall be repeated in order to allow clock synchronisation of the IUT, the
time taken to synchronise may be dependant on the implementation.
** RAI or NOF depending on the implementation options described in CCITT
Recommendation G.706 [4].
Page 178, addition of new annex F
Add the following annex F to the end of the document:

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Annex F (normative): System Conformance Statement (SCS), Protocol
Implementation Conformance Statement (PICS) and
Protocol Implementation eXtra Information for Testing
(PIXIT) for interface points I and I
a b
Notwithstanding the provisions of the copyright clause related to the text of this ETS, ETSI grants that
users of this ETS may freely reproduce the SCS, PICS and PIXIT proforma in this annex so that they can
be used for their intended purposes and may further publish the completed SCS, PICS and PIXIT
proforma.
F.1 SCS proforma for interface point I (TE)
a
F.1.1 Introduction
A client who requests a conformance test shall provide to the test laboratory a System Conformance
Statement (SCS) and a client checklist. The proforma in this clause may be used to present this SCS.
The main purpose of the SCS is to identify the client organization and the test candidate.
The purpose of the client checklist is to provide a record of test-related information.
F.1.2 Proforma structure and content
The proforma consist of the following tables containing pre-printed guide text:
- client organization: for identification of the client organization;
- test candidate: for identification and itemizing of the test candidate;
- test status of the test candidate and testing claims: for indication of the test status of the test
candidate, summarizing of the testing claims, provision of references to associated System
Conformance Test Report (SCTR) and Protocol Conformance Test Report (PCTR), and
specification of the protocols implemented in the test candidate;
- client checklist: for provision of a record of test-related information.
F.1.3 Filling in guidance
The pre-printed guide text in the proforma indicates the kind of information to be filled in by the client.

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Table F.1
Client organization
Client name
Street/No.:
Postal code/City:
Country:
Telephone:
Telefax:
Telex:
Teletex:
Client manager
Name:
Location:
Telephone:
Contact person
Name:
Location:
Telephone:
Additional information

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Table F.2
Test candidate
Test candidate identification:
Name Model Version Serial number
Configuration (identify/describe separate units (e.g. scanner, keyboard, printer, etc.).

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Table F.3
Test status of the test candidate and testing claims
Layer 1 test status and testing claims
Answer by Yes(=Y) or No(=N) according to the claims:
Tested before? (note) Test wanted? PCTR wanted? Log wanted?
NOTE: If "Yes" in the left column "Tested before?", indicate references to existing test documents (if tested at another test
laboratory the existing test documents should be made available to the current test laboratory)
SCTR PCTR
Test candidate reference (short identification):
Layer 1 implementation
Identify layer 1 component
Name Version
Other information (indicate any other information that may itemize the test candidate or the testing claims):

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Table F.4
Client checklist
Reference: subclauses/notes of subclause 6.3.1.3 of ISO/IEC 9646-5 [20].
Details may be specified in the appropriate PIXIT(s) and reference(s) to the relevant PIXIT(s) indicated in this checklist.
Ref. a) COMPLIANCE WITH ISO/IEC 9646-5 [20] (list exceptions, if any):
Ref. b) The information (specification of the test candidate, protocols to be tested) is given in tables F.2
and F.3.
Ref. c) The Remote Single layer Embedded (RSE) test method is used implying that the degree of
terminal equipment testability is sufficient.
Ref. d) Test co-ordination procedures (explain the procedures suitable for use with the test candidate, and
which correspond to the RSE test method or indicate references to clauses of manuals etc. giving
such explanations):
Ref. NOTE a: Physical requirements and other practical information (indicate any physical test requirements
(space, air conditioning etc.) as well as any other information that may be needed/useful):
Ref. NOTE b: The information on whom to contact during the conformance assessment process is given in
table F.1.

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F.2 PICS proforma for interface point I (TE)
a
F.2.1 Introduction
To evaluate conformance of a particular implementation, it is necessary to have a statement of which
capabilities and options have been implemented for a given protocol. Such a statement is called a PICS. A
client who requests a conformance test shall provide to the test laboratory a completed PICS proforma for
each layer to be tested.
This clause defines the PICS proforma applying to the OSI layer 1 (physical layer) of equipment having
interface Ia (see § 2.2 of CCITT Recommendation I.431 [2]) for the connection to the ISDN primary rate
access at reference points T or S/T (coincident S and T) (see CCITT Recommendation I.411 [1]) and
intended to be installed on customers premises.
NOTE: In addition to the information provided by a PICS, information relating to the
implementation and its testing environment is essential. Such extra information is
called a PIXIT. Generally PIXIT proforma are produced and provided by the test
laboratory.
The PIXIT proforma provided in clause F.3 should be used.
F.2.2 PICS proforma structure and contents
The PICS proforma consist of tables structured as indicated in references ISO/IEC 9646-1 [18] and
ISO/IEC 9646-2 [19].
F.2.3 Pre-printed table contents
The pre-printed contents of the PICS tables provide the following:
- table/item identification, see subclause F.2.4;
- item names or short descriptions;
- references to the standards;
- status attributes specifying the status of the items;
- predicates, see "c" below;
- column to be filled in by the client, see subclause F.2.5.
The status attribute in the "Status" column reflects the conformance requirements defined in the
referenced standard as follows:
m (mandatory): the capability is required to be implemented, in conformance with the protocol
specification. When a mandatory capability is not supported, it is a case of non-
conformance, and the client shall give a justification (see subclause F.2.5).
o (optional): the capability may be implemented, and if it is implemented it is required to
conform to the protocol specification.
c (conditional): the requirement on the capability depends on the selection of other optional or
conditional items; the PICS proforma cannot define in advance a definite status
for the capability, it can only indicate that the status depends on the evaluation
of a predicate. The predicates are indicated in the table column "Predicate" or in
the last table row as item notes.
- (dash): not applicable item, i.e. no requirement can be expressed in a given context.

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F.2.4 Table/item identification
The PICS table is provided with a table/item identification label pre-printed to the left in the table headers.
The labels are composed as follows:
- one capital letter, being the first letter of the layer name;
- a serial number.
Each item in a PICS table is provided with a serial number in the left-hand table column, called "Item No."
To identify an item unambiguously, the table label and the item number are combined by use of a slash
character, "/", e.g. in the 2nd table of the Physical layer PICS, the 3rd item is identified by "P2/3".
F.2.5 Filling in guidance
The PICS proforma shall be filled in by the client.
The filling in is done in the rows of right table column named "Support" as follows:
- for implemented items one of: Y, y, Yes, yes or YES is entered;
- for not implemented items one of: N, n, No, no or NO is entered.
For each not implemented mandatory item, a justification shall be given (e.g. as a note added by the client
at the relevant PICS page, or as a client statement in the relevant PIXIT in the PIXIT table named "Clients
additional information").
Table F.5
P1 Optional capabilities
Item Item Reference Status Support
No. ETS 300 011
1.A TE/NT2 has only one user-network interface (note 1). Table 1, o
subclause 5.4.3
1.B TE/NT2 has more than one user-network interface (notes 1, 2). Table 1, o
subclause 5.4.3
2.A TE using interface connector according to ISO/IEC 10173 (note 1). Table 1, o
subclause 6
2.B TE permanently wired to NT (note 1). Table 1, o
subclause 6
3 TE designed for PTNX interconnection. annex A o
4 TE designed to act as master: subclause A.3.1.1 o
- output frequency accuracy ± 32 ppm.
5 Is the TE PTNX with a high clock accuracy class: subclause A.3.1.1 o
- output frequency accuracy ± 1 ppm.
6 Is the TE designed to be connected to the T reference point only? Table 1, o
subclause 5.3
7 Does the TE use bit 2 of frames without frame alignment signal for detection of Table 4, o
loss of frame alignment? subclause 4.4.1
NOTE 1: One of the possibilities (separated with dotted line) shall be chosen.
NOTE 2: If yes, fill in P1/5.

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Table F.6
P2 Timers
Item Item Reference Status Support Range/value
No. ETS 300 011
Allowed Supported
1 The persistent receipt of signals other than normal Table 1, m 100 -
frames verified by timer T1. subclauses 5.9.3.2 1000 ms
.3 and 5.9.3.3.3
2 The persistent receipt of normal frames verified by Table 1, m 10 -
timer T2. subclauses 5.9.3.2 100 ms
.3 and 5.9.3.3.3
3 Timer for recognition of the persistent receipt of A Table 1, m 10 - 50 ms
bit set to 1 (RAI) and E bit set to 0 (CRC4 error). subclause 3.4.1
4 Timer for recognition of loss of signal. Table 1, m > 1 ms
subclause 3.4.1
Table F.7
P3 Functional characteristics
Item Item Reference Status Support
No. ETS 300 011
1 Only point-to-point configuration. Table 1, m
subclause 2.1
2 Layer 1 functions: B-channel or H -channel or H -channel or H -channel, Table 1, m
0 11 12
D-channel. bit timing, octet timing, frame alignment, power feeding, subclause 3.1
maintenance and CRC procedure.
3 Two interchange circuits for transmission of digital signals. Table 1, m
subclause 3.2
4 Power feeding via the interface. Table 1, o
subclause 3.2
5 Definition of signals between the network and user sides: Table 1, m
- normal operational frames; subclause 3.4.1
- RAI remote alarm indication;
- LOS no received signal;
- AIS alarm indication signal;
- CRC error information.
6 Definitions of states at user sides: Table 1, m
- F0 state: Loss of power on users side; subclauses 3.4.2
- F1 state: Operational state; and 3.4.3
- F2 state: Reception of RAI;
- F3 state: Loss of signal or frame alignment;
- F4 state: Reception of AIS;
- F5 state: Reception of RAI and continuous CRC error report;
- F6 state: Power on state.
7 Definitions of primitives: Table 1, m
- PH-AI Activate indication; subclause 3.4.5
- PH-DI Deactivate indication;
- MPH-AI Management activate indication;
- MPH-DI Management deactivate indication.
8 Operational functions as defined in state tables for user side. Table 1, m
subclause 3.4.6
Table 2/I.431

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Table F.8
P4 Electrical characteristics
Item Item Reference Status Support
No. ETS 300 011
1 Electrical interface: balanced 120 ohm (symmetric pair). Table 1, m
subclause 5.1
2.A subclause A.3.1.1 c
Bit rate is 2 048 kbit/s ± 1 ppm (note)
P1/5
(TE PTNX with a high clock accuracy class).
2.B Bit rate is 2 048 kbit/s ± 32 ppm (note) subclause A.3.1.1 c
P1/3
(PTNX interconnection).
2.C Table 2, c
Bit rate is 2 048 kbit/s ± 50 ppm (note)
subclause 6.1
(all others).
3.A Is the TE able to synchronize to 2 048 kbit/s ± 1 ppm? subclause A.3.1.1 c
(TE PTNX with a high clock accuracy class). P1/5
3.B Is the TE able to synchronize to 2 048 kbit/s ± 5 ppm? Table 1, c
(TE connected to T reference point only). subclause 5.3 P1/6
3.C Is the TE able to synchronize to 2 048 kbit/s ± 32 ppm? subclause A.3.1.1 c
(PTNX interconnection). P1/4
4 AIS recognition Table 2, m
Bit rate is 2 048 kbit/s ± 32 ppm. subclause 6.1
5 Code is HDB3. Table 2, m
subclause 6.1
annex A/G.703
6 Pulse shape. G.703, Fig. 15 m
7 Nominal peak voltage: 3 V, peak voltage of a space: 0 ± 0,3 V, nominal pulse Table 2, m
subclause 6.2
width: 244 ns.
Ratio of the amplitudes of positive and negative pulses at the centre of pulse
interval: 0,95 to 1,05.
Ratio of the widths of positive and negative pulses at the nominal half
amplitude: 0,95 to 1,05.
8 Return loss at the input port: Table 2, m
subclause 6.3.3
- 51 kHz ≤ f < 102 kHz return loss > 12 dB;
- 102 kHz ≤ f ≤ 2 048 kHz return loss > 18 dB;
- 2 048 kHz < f ≤ 3 072 kHz return loss > 14 dB.
9 Input port immunity against reflections: Table 2, m
- signal to interference ratio 18 dB. subclause 6.3.4
10 Eight bits per time slot. Table 1, m
subclause 5.2.1
11 32 time slots per frame. Table 1, m
subclause 5.2.2
12 Assignments of bits in time slot 0, frame alignment signal, CRC4 multiframe Table 1, m
alignment signal, CRC4-bits, CRC4 error information. subclauses 5.2.3
and 5.2.4.1
Table 3,
subclause 2.3.2
13 Time slot 16 is assigned to the D-channel. Table 1, m
subclause 5.2.4.2
14 Assignment of channels (B or H or H or H ). Table 1, m
0 11 12
subclause 5.2.4.3
15 Independent transmission provided by the time slots. Table 1, m
subclause 5.2.4.4
16 The TE synchronizes its timing from the signal received. Table 1, m
subclause 5.3
17 TE with more than one user network interface shall have the ability to Table 2, c
synchronize its clock to more than one access. subclause 6.1 P1/1.B
18.A TE Input Jitter Tolerance: Minimum tolerance to jitter and wander (note). Table 1, c
subclause 5.4.2
Figure 7/I.431
18.B Tolerable jitter at the inputs (PTNX interconnection) (note). subclause A.3.1.1 c
P1/3
19.A TE Output Jitter: only one user-network interface (note): Table 1, c
- low - high cut-off = 20 Hz - 100 kHz: subclause 5.4.3.1 P1/1.A
max. jitter = 1,1 UI;
- low - high cut-off = 400 Hz - 100 kHz:
max. jitter = 0,11 UI.
(continued)

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Table F.8 (concluded)
P4 Electrical characteristics
Item Item Reference Status Support
No. ETS 300 011
19.B More than one user-network interface (note): Table 1, c
- low - high cut-off = 4 Hz - 100 kHz: subclause 5.4.3.2 P1/1.B
max. jitter = 1,1 UI;
- low - high cut-off = 40 Hz - 100 kHz:
max. jitter = 0,11 UI.
19.C PTNX interconnection (note): subclause A.3.1.1 c
- low - high cut-off = 4 Hz - 100 kHz: P1/3
max. jitter = 1,6 UI;
- low - high cut-off = 40 Hz - 100 kHz:
max. jitter = 0,11 UI.
20 Tolerable longitudinal voltage: Table 1, m
- input longitudinal voltage V 2 V for subclause 5.5
l ≤ rms
10 Hz f 30 MHz.
≤ ≤
21 Impedance towards ground (receiver and transmitter): Table 1, m
- 10 Hz < f 1 MHz: R < 1000 ohm. subclause 5.7
≤
NOTE: One of the possibilities (separated with dotted lines) shall be chosen according to the answers given in table F.5.
Table F.9
P5 Interface procedures
Item Item Reference Status Support
No. ETS 300 011
1 Codes for idle time slots: Table 1, m
- pattern including at least three binary one's. subclause 5.8.1
2 HDLC flags to be transmitted when layer 2 has no frames to send. Table 1, m
subclause 5.8.2
3 Loss of frame alignment: Table 4, m
- reception of three consecutive incorrect frame alignment signals. subclause 4.1.1
4 Strategy for frame alignment recovery: Table 4, m
- detection of correct frame alignment signal in frame n; subclause 4.1.2
- detection of bit 2 = 1 in frame n+1;
- detection of correct frame alignment signal in frame n+2.
5 CRC multiframe alignment: Table 4, m
- detection of two valid CRC multiframe alignment signal within 8 ms. subclause 4.2
6 CRC bit monitoring. Table 4, m
subclause 4.3
7 Monitoring procedure. Table 4, m
subclause 4.3.1
8 Monitoring for false frame alignment: Table 4, m
- Detection of 915 or more errored CRC block's out of 1 000 indicates subclause 4.3.2
false frame alignment.

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Table F.10
P6 Maintenance of the interface
Item Item Reference Status Support
No. ETS 300 011
1 Definition of maintenance signals: Table 1, m
- RAI, indicates loss of layer 1 capability at user-network interface, subclause 5.9.1
RAI is transmitted in the opposite direction of the error;
- AIS, indicates loss of layer 1 capability in the ET-to-TE direction of the
user-network interface;
- CRC, error report: E bit.
2 CRC procedure. Table 1, m
Special use of bit 1 of the frame: subclause 5.9.2.1
- Bit 1 is used for cyclic redundancy check-4. Table 3,
subclause 2.3.3.1
3 Allocation of bit 1 to 8 of the frame for a complete CRC-4 multiframe. Table 3, m
subclause 2.3.3.2
Table 4b/G.704
4 CRC-4 multiframe structure. Table 3, m
subclause 2.3.3.3
5 Use of bit 1 in CRC-4 multiframe. Table 3, m
subclause 2.3.3.4
6 Multiplication/division process. Table 3, m
subclause 2.3.3.5.
1
7 Encoding procedure. Table 3, m
subclause 2.3.3.5.
2
8 Decoding procedure. Table 3, m
subclause 2.3.3.5.
3
9 General requirements: Table 1, m
- detect anomalies; subclause 5.9.3.1
- detect defects;
- take action when anomalies or/and defects are detected;
- detect received defect indication signals.
10 Maintenance functions on the user side, anomalies and defects detection: Table 1, m
- loss of power; subclause 5.9.3.2.
- loss of incoming signal; 1
- loss of frame alignment;
- CRC error.
11 Detection of defect indication signals on the user side: Table 1, m
- RAI; subclause 5.9.3.2.
- AIS. 2
12 Consequent actions on the user side (see table F.6 concerning the timers. Table 1, m
subclause 5.9.3.2.
3
Table F.11
P7 Power feeding
Item Item Reference Status Support
No. ETS 300 011
1 Power feeding requirements for feeding NT1s. Table 1, clause 8 o
2 Provision of power to the NT1 via Ia. Table 1, o
subclause 8.1
3 Power available at the NT1 Table 1, o
- Power > 7 Watt. subclause 8.2
4 Voltage at the input of the NT1 Table 1, o
- -57V ≤ U ≤ -20V. subclause 8.3
5 Safety requirements: Table 1, o
- protection against short circuits and overload; subclause 8.4
- no damage of power sink with interchange of wires.

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SIST ETS 300 011/A2 E1:2003
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ETS 300 011: April 1992/A2: March 1996
Table F.12
P8 Conformance
Item Item Reference Status Support
No. ETS 300 011
1 Transparent loopback of at least 1 time slot towards the interface annex C, o
(note 1). subclause C.1.2.1
11
2 Ability to transmit a PRBS 2 -1 in a time slot (note 2). annex C, o
subclause C.1.2.1
NOTE 1: If yes, fill in P1/3.
NOTE 2: If yes, fill in P1/4.

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SIST ETS 300 011/A2 E1:2003
Page 18
ETS 300 011: April 1992/A2: March 1996
F.3 PIXIT proforma for interface point I (TE)
a
F.3.1 Introduction
In order to test a protocol implementation, information relating to the implementation and its testing
environment in addition to that provided by the PICS is essential. Such extra information is called a
Protocol Implementation eXtra Information for Testing (PIXIT). A client who requests a conformance test
shall provide to the test laboratory a completed PIXIT proforma for each layer to be tested.
The proforma provided in table F.14 shall be used.
F.3.2 Proforma structure and contents
The PIXIT proforma are tables containing pre-printed guide text and empty table space intended to be
used by the client for explanations, specification of details etc.
The proforma given in table F.13 is intended for client indication of the environmental conditions to be
used during testing, and test limitations, if any. Note, that in case no environmental value or range is
indicated by the client, the test laboratory will use a value within the ranges pre-printed in the proforma.
F.3.3 Table / item identification
Corresponding to the PICS tables, each PIXIT table is provided with an identification label pre-printed to
the left in the tables headers. In order to distinguish between PICS and PIXIT identifications, an X is
added to the prefix letter. The PIXIT labels are composed as follows:
- two capital letters being the first letter of the layer name and the additional X;
- a serial number.
Each pre-printed item in a PIXIT table is provided with a serial number in the left hand tables column
called "Item No.".
To identify a PIXIT item unambiguously, the table label and item number are combined using a slash
character, "/", e.g. in the 1st table of the Physical layer PIXIT, the 3rd item is identified by "PX1/3".
F.3.4 Filling in guidance
The PIXIT proforma shall be filled in by the client. The filling in is done according to the pre-printed guide
test in the tables indicating the kind of information to be entered.
In order to reduce the test time, it is essential not only that the required explanations, specifications etc.
are detailed but also that conditions which cannot be predetermined are explained/specified in details
(using empty table space, additional pages or giving references to manuals etc.).
The information provided in a PIXIT shall not conflict with information provided in the corresponding PICS
or with the requirements of the standards.

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