ITU-T D.300 R
TELECOMMUNICATION (03/95)
STANDARDIZATION SECTOR
OF ITU
RECOMMENDATIONS FOR REGIONAL
APPLICATION
STANDARDS RATES APPLICABLE IN THE
INTERNATIONAL TELECOMMUNICATION SERVICES
DETERMINATION OF ACCOUNTING RATE
SHARES IN TELEPHONE RELATIONS
BETWEEN COUNTRIES IN EUROPE
AND THE MEDITERRANEAN BASIN
ITU-T Recommendation
D.300 R
(Previously "CCITT Recommendation")
FOREWORD
The ITU-T (Telecommunication Standardization Sector)
is a permanent organ of the International Telecommunication Union
(ITU). The ITU-T is responsible for studying technical, operating
and tariff questions and issuing Recommendations on them with
a view to standardizing telecommunications on a worldwide basis.
The World Telecommunication Standardization Conference
(WTSC), which meets every four years, establishes the topics for
study by the ITU-T Study Groups which, in their turn, produce
Recommendations on these topics.
The approval of Recommendations by the Members of
the ITU-T is covered by the procedure laid down in WTSC Resolution
No. 1 (Helsinki, March 1-12, 1993).
ITU-T Recommendation D.300 R was revised by ITU-T
Study Group 3 (1993-1996) and was approved under the WTSC Resolution
No. 1 procedure on the 20th of March 1995.
___________________
NOTE
In this Recommendation, the expression "Administration"
is used for conciseness to indicate both a telecommunication administration
and a recognized operating agency.
ã ITU 1995
All rights reserved. No part of this publication
may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission
in writing from the ITU.
CONTENTS
Recommendation D.300
R (03/95)
Page
INTRODUCTION
When, in full exercise of their sovereignty, the
Administrations of the countries of Europe and the Mediterranean
Basin negotiate among themselves agreements for determining the
accounting rate shares to be applied in their telephone relations,
it is recommended that they take into consideration:
- for the determination of accounting rate shares
and accounting rates, the provisions of clause 2 (Determination
of accounting rate) of this Recommendation and the provisions
of Recommendation D.307 R;
- for fixing tariffs for frontier relations, the
provisions contained in clause 4 of this Recommendation.
Recommendation D.300 R
Recommendation D.300 R (03/95)
DETERMINATION OF ACCOUNTING RATE SHARES
IN TELEPHONE RELATIONS BETWEEN COUNTRIES
IN EUROPE AND THE MEDITERRANEAN BASIN1)
2) 3)
(revised in 1991, 1992 and in 1995)
1 Explanation of some of the terms used in this Recommendation
An explanation of some of the terms used in this
Recommendation is given in Recommendation D.000.
2 Determination of accounting rate share in telephone relations
between countries in Europe and the Mediterranean Basin
2.1 General
2.1.1 Since the setting-up
of any international call involves both the international network
and the national networks of the terminal countries, the accounting
rate share due to each country is derived from three basic elements,
to which separate standard rates are applied:
- the line (transmission) part of the international
network,
which includes the various transmission systems used and is a
function of the distance;
- the international exchange,
i.e. the switching part of the international circuit,
plus the terminal transmission equipment;
- the national extension,
which covers the cost of the national exchanges
and trunk transmission means for the delivery of international
calls. Noting the definition of national extension in Recommendation
D.000 the TEUREM Group did not include the local loop in its cost
analysis.
2.1.2 In special cases
where the line (transmission) part of an international
connection is:
- a tropospheric scatter link;
or
- a HF radio link,
the provisions of this Recommendation with regard
to the determination of an accounting rate share in relation to
the length of the international circuit are not applicable, and
accounting rate shares should be agreed upon between the Administrations
concerned.
Cases in which the line (transmission) part
of a connection is a satellite link are dealt with in Annex B.
2.2 Charging zones
For calculating accounting rate shares, each country
may be divided into charging zones. If need be, different charging
zones may be fixed in a given country for traffic exchanged with
different countries.
It is desirable that the number of charging zones
for international traffic, in any one country, should be reduced
to a minimum. As a general rule, in services between non-adjacent
countries, each country should constitute one single zone.
2.3 Calculation of distances (line part)
2.3.1 Distances to be taken into consideration
2.3.1.1 General case
2.3.1.1.1 In determining the share payable to a country
for the use of international circuits, the distance to be taken
into consideration is:
In a terminal country
- The crowflight distance between:
a) the point at which the international circuit crosses the frontier;
and
b) the international exchange at which the circuit terminates.
In a transit country
- The crowflight distance between the two frontier points
at which the international circuit enters and leaves the country
in question.
2.3.1.1.2 The same provisions apply to the determination
of crowflight distances for groups, supergroups, mastergroups
and supermastergroups.
The above provisions for the calculation of distances apply to
international circuits both on land cables and on radio-relay
links.
2.3.1.2 Special cases
2.3.1.2.1 Radio-relay links crossing the sea or a third country
When a frontier is crossed by a radio-relay section of an international
circuit passing over a third country or over the sea, without
an intermediate relay station,
the frontier point for measuring the circuit length shall be the
point midway between the two relay stations on either side of
the frontier.
2.3.1.2.2 Submarine cables
With regard to international circuits which are routed in submarine
cables, the distance to be used for accounting will be calculated
as follows:
a) for the land section of the circuit to the
submarine cable station, the distance shall be calculated in accordance
with the general principles (i.e. the crowflight distance), it
being assumed that the point at which the circuit crosses the
frontier is the cable station;
b) for the submarine cable section,
the distance used shall be the actual route distance between the
submarine cable stations as determined and agreed by the joint
owners of the cable; the distance will be divided appropriately
(normally 50/50) between the countries at the extremities of the
cable.
2.3.1.2.3 Special itineraries
In exceptional circumstances, multiplication factors may be applied
to the crowflight distance, from which the terminal and transit
shares are calculated, to take account of special itineraries.
For example, in the case of a direct transit country, the crowflight
distance between the points on the frontier at which the circuit
enters and leaves the country may (in exceptional circumstances)
be replaced by a length representing the sum of two crowflight
segments making up a broken line, etc.
2.3.2 Possibility of weighting distances
For calculation of the crowflight distances for the international
section, a weighting according to the number of circuits is normally
applied in a given relation to simplify accounting:
- when there are several international arteries
with different itineraries terminating at an international exchange;
- when there are several international exchanges in a country
for the relation concerned.
This weighting serves to determine a length (crowflight distance)
for fixing the accounting rate share relating to the international
section and it would remain in force as long as the structure
of the network was not significantly changed. This length of the
international section would then be used to fix the international
section element for the charges for international telephone and
telegraph circuits, groups, supergroups, mastergroups and supermastergroups.
2.3.3 Rounding off distances
2.3.3.1 Distances less than 50 km shall be rounded up to
50 km.
Example: distance of 24 km rounded up to 50 km.
2.3.3.2 Other distances shall be rounded to the nearest
multiple of 50 km.
Examples
- distance of 72 km rounded to 50 km;
- distance of 126 km rounded to 150 km;
- distance of 175 km rounded to 200 km.
2.3.3.3 This rounding rule applies to the distances in
each of the terminal countries and in each of the transit countries
and is applied to the total distance calculated for any one country.
It is applicable to the remuneration of Administrations both on
the basis of a flat-rate price for the facilities made available
and on the basis of traffic units.
2.3.3.4 When distances are weighted in accordance with
the provisions of 2.3.2 above, the rounding shall be applied only
after the weighted distance has been calculated.
2.3.4 Existence of several routes in a given relation
When in a given relation there are several routes traversing different
countries, these transit countries shall in all cases receive
the share or flat-rate price normally due to them for the distance
between the points of entry and exit; any cost of equalizing collection
charges in a relation comprising different routes shall be borne
solely by the Administration of the country of origin and no deduction
shall be made from the remuneration due to the transit countries.
2.4 Standard rates to be applied for international accounting4)
For international accounting purposes, there are
two methods of remuneration for the facilities made available
by Administrations:
- on the basis of traffic units;
- on the basis of a flat-rate price for the facilities
made available.
2.4.1 Remuneration on the basis of traffic units
2.4.1.1 Considering that increasing use is being made of
digital systems and channels in the operation of telephone relations
between countries in Europe and the Mediterranean Basin, standard
per-minute rates have been calculated for automatic traffic, taking
into account the results of the former Recommendation D.300 R
(Red Book) referring to only analogue system and from digital
cost analyses carried out in 1990.
2.4.1.2 Since the degree of digitization varies from country
to country and over time, the method of determining accounting
rate shares in this Recommendation uses a simplified division
into categories to better reflect differences in cost structures
among Administrations.
2.4.1.3 In order to reflect the actual costs, a degree
of digitization is applied to all three network components (national
extension, international exchange and international transmission)
relevant for establishing an accounting rate.
2.4.1.4 Accounting rates between two parties in a bilateral
relation can be calculated from the rates detailed in the table
below (see 2.4.1.5).
2.4.1.5 Standard accounting rate shares components in SDRs
per minute
Category % digitization
| National
extension |
International exchange | International transmission/100 km
|
0-30% |
0.1026 | 0.0324
| 0.0054 |
31-60%
| 0.0924 | 0.0228
| 0.0044 |
61-100%
| 0.0762 | 0.0129
| 0.0033 |
2.4.1.6 The accounting rates between two parties should
be based on the more conservative, i.e. the lower degree
of digitization for each of the network components.
2.4.1.7 A worked example is shown below.
In this example, the degree of digitization for the three network
components is given for two countries (half of the international
circuit being 100 km).
| National extension
| International exchange |
International transmission |
Country A
| 26% | 82%
| 58% |
Country B
| 35% | 70%
| 58% |
Accounting rate share = 0.1026 + 0.0129 + 0.0044 ´
1 = 0.1199 SDR.
2.4.1.8 A possible method
on how to establish the degree of digitization for each of the
components is shown in Annex A.
2.4.1.9 The accounting
rate shares shown in the table at 2.4.1.5 constitute a standard
per category. Administrations may agree on lower rates. For instance,
this could be the case where the limits of the category are approached.
2.4.1.10 To determine
accounting rate shares components (in SDR/minute) due to transit
countries can be calculated from the table shown below.
Category % digitization
| Transit exchange | International transmission/100 km
|
0-30% |
0.0468 | 0.0054
|
31-60%
| 0.0324 | 0.0044
|
61-100%
| 0.0177 | 0.0033
|
2.4.1.11 To determine the accounting rate shares due to
destination and transit countries in manual operation, the following
standard rates, per minute of conversation time, are recommended.
| SDR |
- Per 100 km of international circuit (excluding any national circuit required for connecting the international exchange to the national exchange serving the subscriber)
- For the manual international exchange in the country of destination
|
0.013
0.653
|
- For a manual international exchange in a transit country
| 0.653 |
- National extension |
0.114 |
2.4.1.12 a) The standard rates shown under 2.4.1.5, 2.4.1.10
and 2.4.1.11 for the line element per 100 km of circuit
and per minute may not be appropriate to some small capacity submarine
cables. In these cases, the rates should be fixed by agreement
among the parties concerned.
b) The standard rates for the exchange component under 2.4.1.5,
2.4.1.10 and 2.4.1.11 include the cost of the transmission equipments
for one extremity in terminal operation and for two extremities
in transit operation.
2.4.2 Remuneration on the basis of a flat-rate price for the
facilities made available
2.4.2.1 Remuneration of a direct transit country
2.4.2.1.1 To determine the flat-rate price for remuneration
for the analogue transmission facilities made available by Administrations,
the following standard rates are recommended.
| SDR |
| Per year and per 100 km
of crowflight distance
(line part, component B) a)
|
- for a telephone circuit b), c)
| 111392
|
- for a group b), c)
| 113 920
|
- for a supergroup b), c)
| 116 335
|
- for a mastergroup c)
| 165 338
|
- for a supermastergroup c)
| 179 680 |
a) The cost of international telecommunication circuits should be expressed in the form:
A + B ´
where A represents all costs relating to terminal transmission equipment for one end of the international circuit; B represents the costs per 100 km (crowflight distance) of circuit.
b) to allow for the small capacity of some submarine cables, a correction factor may be applied to these rates.
c) Including the use of modulation and demodulation equipments or through band filters in the direct transit country, when the transit transmission facilities are given by complete unit.
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2.4.2.1.2 When digital facilities are made available, they
should be remunerated according to the standard rates given in
Recommendation D.307 R.
2.4.2.1.3 When a circuit leased to a private user passes
through a direct transit country, the Administration of this country
will be remunerated by the Administrations of the terminal countries
with a flat-rate price on the same basis as if the circuit were
an ordinary public service circuit.
2.4.2.2 Remuneration of a country of destination
To determine the flat-rate price for remuneration of countries
of destination for facilities made available by Administrations,
the following standard rates are recommended:
1) For the transmission channel (line part, component
B): see 2.4.2.1.
2) For the international exchange (including the terminal
transmission equipment)
- per year and per international circuit connected:
Manual operation
| Automatic operation
|
(analogue exchange) a)
| Analogue exchange a)
| Digital exchange b)
|
19 590 SDR
| 2340 SDR | 270 SDR
|
a) The remuneration for analogue terminal transmission equipment (element A) has been included in the above rates based on annual costs per extremity of:
- 1425 SDR for a circuit;
- 1045 SDR for a group;
- 2189 SDR for a supergroup;
- 5227 SDR for a mastergroup;
- 9800 SDR for a supermastergroup.
b) The remuneration for digital terminal transmission equipment (element A) has been included in the above rates in accordance with Table 2/D.307 R.
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3) For the national extension
- per year and per international circuit connected:
- manual operation (analogue):
· 3420 SDR
- automatic operation (analogue/digital):
Category % digitization
| SDR per year |
0-30% |
7952 |
31-60%
| 6930 |
61-100%
| 6287 |
2.5 Remuneration for facilities made available for the extension
of intercontinental circuits
In principle, the rates mentioned in clause 2 above
apply also to the remuneration of facilities made available for
the extension of intercontinental cable or satellite circuits.
3 Collection charges in telephone relations between countries
in Europe and the Mediterranean Basin
3.1 General
3.1.1 The establishment
of the collection charge is a national matter. However, the level
of the tariff levied on the user should be cost-oriented having
due regard to the universal nature of the telephone service.
3.1.2 In considering the
collection charges for a relation in which automatic and semi-automatic
working both exist, each Administration should decide to fix its
charges, either
- by establishing different charges for each method
of operation; or
- by establishing a single collection charge weighted
according to the volume of each type of traffic.
3.1.3 To recover the costs
of operator assistance, Administrations may levy additional charges
per call, the level of which is a national matter.
3.2 Charging zones
For fixing collection charges each country may be
divided into charging zones. If need be, different charging zones
may be fixed in a given country for traffic exchanged with different
countries.
It is desirable that the number of charging zones
for international traffic, in any one country, should be reduced
to a minimum. As a general rule, in services between non-adjacent
countries, each country should constitute one single zone.
The fixing of zones for collection charges does not
imply the same for zones for accounting rate shares which can
be weighted appropriately to make allowances for a zonal structure.
Similarly, the fixing of zones for accounting rate shares (see
2.2) does not imply any requirement for fixing zones for collection
charges.
4 Frontier relations between countries in Europe and the Mediterranean
Basin
The conditions governing the establishment and operation
of frontier relations depend largely on the structure of the national
networks in the frontier areas. These conditions tend to alter,
particularly as a result of network automation, which leads in
turn to automation of frontier relations. Consequently, the collection
charges applied to these relations are tending to become increasingly
subject to limitations imposed by the automatic charging equipments
used.
Whenever the situation permits, there should be no
exchange of international accounts for frontier calls, the entire
charge being retained by the Administration which collects it.
The latter should, however, supply all frontier traffic information
required to the Administration of the country of destination.
Annex A
Guidelines for determining the degree of digitization
(This annex forms an integral part of this
Recommendation)
A.1 National extension
The national extension consists of a number of network
elements. International traffic, incoming as well as outgoing,
is routed via these network elements from the international exchange
to the subscriber line and vice versa. For each network element
a different degree of digitization may be found. This is the result
of the national network evolution-plan towards a digitized network.
To deal with this complicated network situation in a practical
way, the following simple method is proposed for determining an
"all-in" degree of digitization for the national extension.
(The figures used are an example and should be replaced
by figures applicable to your own circuit-switched network.)
- To determine the average digitization degree of
(local and trunk) exchanges (Dexch%) in your national extension:
| Number
| % |
|
· number of switched 4 kHz circuits
| = 1000 | 33.3%
| |
· number of switched 64 kbit/s circuits
| = 2000 | 66.7%
| (Dexch%) |
- To determine the average digitization degree of the transmission
part (Dtrans%) in your national extension on the basis of km circuits:
| Kilometres
| % |
|
· total length of 4 kHz circuits
| = 10 000 | 40%
| |
· total length of 64 kbit/s circuits
| = 15 000 | 60%
| (Dtrans%) |
- To obtain an average degree of digitization of the national
extension, calculate an arithmetic mean of these two values:
= D%
Example with figures:
= 63.35%
A.2 International exchange
According to the proportion of circuits (outgoing
and incoming) terminating at each type of international exchange
(analogue and digital) utilized in a bilateral relation.
A.3 International transmission
According to the proportion of circuits (incoming
and outgoing) 4 kHz analogue and 64 kbit/s digital utilized
in a bilateral relation.
Annex B
Remuneration for the facilities used to set up telephone-type
(4 kHz analogue circuits
and 64 kbit/s bearer) satellite circuits (INTELSAT system)
via an earth station
in Europe and the Mediterranean Basin
(This annex forms an integral part of this
Recommendation)
B.1 Flat-rate charges for the provision of telephone-type
(4 kHz analogue circuits and 64 kbit/s bearer) circuits
set-up via a foreign European earth station
Preliminary note
The charges are the same, whether the circuit is
used in an intra-European or an intercontinental relation.
When an Administration operates a direct satellite
circuit set-up via a foreign European earth station, the following
standard rates are recommended for the remuneration of the facilities
provided by the country operating the earth station.
B.1.1 For the remuneration
of the international circuit section between the border of the
outgoing terminal country and the international exchange of the
country operating the earth station5):
- 392 SDR per 100 km of transmission channel (line
part) per annum, or the standard rates set out in Recommendation
D.307 R when a digital circuit is used;
- where appropriate, the amount laid down in 2.4.2.2,
2) a), to pay for the terminal equipment (component A)
in the international exchange.
B.1.2 For the remuneration
of the earth station and the national extension from the international
exchange mentioned in B.1.1 above, to that station:
- 9000 SDR per circuit and per annum.
B.1.3 For the remuneration
of the space segment, the amount fixed by INTELSAT and
usually payable directly to that organization.
B.2 Traffic unit price applicable in telephone relations between
countries of Europe and the Mediterranean Basin, for traffic routed
via satellite links
Preliminary note
The same standard rates are used to determine the
accounting rate shares payable to terminal and transit (switched
transit) countries.
B.2.1 Routing via satellite links only
When, in a given relation, all traffic is routed using international
satellite links, the terrestrial distance between the respective
international terminal or transit exchanges is disregarded. The
costs to be taken into account for determining the terminal or
transit shares relating to the use of the link are:
- the cost of the earth station and the national terrestrial extension
to the international exchange in the same country (including a
component A in the exchange);
- the cost of the space segment.
The accounting rate shares applicable per minute are as follows:
- for the earth station and the national terrestrial extension
to the international exchange in the same country (including a
component A in the exchange): 0.116 SDR;
- for the space segment: 0.047 SDR.
B.2.2 Routing via satellite and terrestrial links
When, in a given relation, international traffic is routed via
both satellite and terrestrial links, account should be taken
of the provisions of 2.3 concerning the calculation of terrestrial
circuit distances, as well as of the cost elements involved in
satellite routing specified in B.2.1 above. When these two components
have been calculated separately, a weighting factor based on the
number of circuits set up on each transmission medium is applied
to determine the transmission (line part) element of the
accounting rate.
NOTE - To take account of the relatively low utilization
factor of certain earth stations, a correction factor may be applied
to the standard rates given in this annex by the Administrations
owning the stations concerned.
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