30 September 2007
In-house installations
Technical requirements for in-house installation of wired analogue
and digital interfaces
Doc. ID
2007-09-30 GV08 Hausinstallation
Version
1.1
Status
Valid
Date of issue
30 September 2007
Valid from
1 January 2008
Document name
2007-09-30 GV08 Hausinstallation.doc
Only the german version counts for reference!
Swisscom
Title
Date of issue:
Doc. ID
Version
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Technical requirements for in-house
installation of wired analogue and
digital interfaces
September 30, 2007
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In-house installations
Table of contents
1 Introduction ................................................................................................................................................3
1.1 Background................................................................................................................................................3
1.2 Aim and purpose........................................................................................................................................3
1.3 Scope of application...................................................................................................................................3
1.4 Terminology, abbreviations.........................................................................................................................3
1.5 Referenced documents...............................................................................................................................3
2 In-house installation requirements...........................................................................................................4
2.1 Definition of the installation areas of the three access types .......................................................................4
2.2 General ......................................................................................................................................................5
2.3 Key values for in-house installations ...........................................................................................................5
2.4 Requirements with respect to cables...........................................................................................................5
2.5 Telephone jacks..........................................................................................................................................5
2.6 Broadband Internet (DSL) socket.................................................................................................................6
2.7 NTU for Broadband Internet (DSL) ..............................................................................................................8
2.8 Access scenarios .........................................................................................................................................8
3
Annex: Broadband Internet (DSL) socket (examples)..............................................................................8
Swisscom
Title
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Technical requirements for in-house
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digital interfaces
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1
Introduction
1.1
Background
The basis for this document is the Decree on Telecommunications Services (DTS) [3], specifically Arts. 16
and 17.
1.2
Aim and purpose
Swisscom's scope of responsibility for the provision of telecommunications equipment (in this case, the
physical BSP line) ends at the building entry point and/or the network separation point (NSP). Swisscom is
not under any obligation to provide the in-house installations. Nonetheless, the in-house installations do
affect the transmission quality and thus also the services available at the network termination point (NTP),
which Swisscom offers as part of its BSP. The in-house installations must therefore comply with these
requirements in order to ensure correct functioning of the Universal services (BSP) available at the NTP.
1.3
Scope of application
These requirements concern the wired analogue access (EconomyLINE) already included in the Basic Service
ISDN
Provision (BSP), the wired digital access via an ISDN basic access (MultiLINE ) and also, as of 1 January
2008, the broadband (DSL) access for Internet access.
Electromagnetic compatibility and electrical safety do not come under the scope of this document.
1.4
Terminology, abbreviations
ADSL
DSL
TE
EMC
DTS
NT1
NTP
NSP
NTU
BSP
Asymmetric Digital Subscriber Line
Digital Subscriber Line
Terminal Equipment (EG / Endgerät)
Electromagnetic Compatibility
Decree on Telecommunications Services (FDV / Verordnung über Fernmeldedienste)
Network Termination Type 1
Network Termination Point (Netzabschlusspunkt)
Network Separation Point (NTS / Netz-Trennstelle)
Network Termination Unit (NAG / Netzabschlussgerät)
Basic Service Provision (Universal service / Grundversorgung)
1.5
Referenced documents
[1] 6PHENCE_0157C00E_1
Interface of the Public Network; Version 1, 20.12.2002
[2] 6PHENCE_0161C00D_1
Analogue Subscriber Line; Version 1, 20.12.2002
[3] OFCOM - SR 784.101.1
Verordnung vom 9. März 2007 über Fernmeldedienste (FDV);
1 April 2007 version
[4] OFCOM - SR 784.101.113 / 1.6 Technische und administrative Vorschriften betreffend die
Eigenschaften von Schnittstellen der Grundversorgung; Version of 2
October 2006
Swisscom
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Technical requirements for in-house
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2
In-house installation requirements
2.1
Definition of the installation areas of the three access types
The network separation point (NSP) is the transfer point from the access network to the customer's inhouse installations. The access network and the NSP are the property and responsibility of Swisscom.
The network separation point (NSP) corresponds to the building entry point referred to in the DTS (see Art.
17 [3]).
The network termination point (NTP) corresponds to the access point referred to in the DTS (see Art. 16
[3]).
For a digital access, the network termination point is the jack on the NT1 (interface Ib ref. point S/T). The
NT1, at the end of the in-house installation, is the property of Swisscom.
In the case of an analogue access, the network termination point is the telephone jack connected to the
Broadband Internet (DSL) socket or, if no such socket is installed, the closest jack to the NSP in terms of
cable length.
For broadband Internet access, the network termination point is the Ethernet 100Base-T [4] interface at the
output of the network termination unit (NTU). The NTU can be purchased either direct from Swisscom or
on the open market.
The in-house installation begins at the NSP and ends at the NTP in the case of an analogue access, on the
NT1 (interface Ia reference point U) in the case of a digital access and at the NTU in the case of a
broadband Internet access. This is always a point-to-point connection.
Ia Ref. U
Ib Ref. S/T
NSP
NTP
l1
TE
NT1
Digital access
ISDN
MultiLINE
Analogue access
EconomyLINE
l1
Analogue access
EconomyLINE
* Socket
DSL
NTU
Broadband Internet
access
Access network
Figure 1:
Swisscom
In-house installation
System installation
Definition of the installation areas of the three access types (* see Section 2.6)
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Technical requirements for in-house
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2.2
General
ISDN
ISDN
It is possible to switch from EconomyLINE to MultiLINE or from MultiLINE to EconomyLINE. In the basic
service provision, broadband Internet is only available/assured in conjunction with EconomyLINE.
The lines must be exclusively available for the access concerned (i.e. no other frequency bands may be used
on the same line). Exceptions are made for other accesses/services from Swisscom.
2.3
Key values for in-house installations
ISDN
The values applicable to in-house installations with respect to EconomyLINE and MultiLINE
DC resistance of wires ≤ 10 Ω/100 at 20°C
Wave attenuation ≤ 1 dB/100 m at 40 kHz
2.4
are as follows:
Requirements with respect to cables
Per access line twisted cable with a conductor diameter of at least 0.5 mm is stipulated for in-house
installations. The line must not exceed 100 m in length (cf. Figure 1, l1 ≤ 100 m). U 72 type cable or Cat5
type cable pairs with an electr. wave impedance of 100-135 (+/- 15%) ohms are recommended. I83 does
not need to be replaced but is no longer recommended for new installations.
Larger diameters and/or better cable types (twisted and shielded) are advantageous (also with respect to
broadband technology).
2.5
Telephone jacks
The most common telephone sockets are types TT87 (or TT83), RJ45 and RJ11.
For an analogue access, the TT87 or RJ45 jack (with cover/adapter for RJ11) is recommended (cf. Tables 1 &
3, or 2). If shielded installation cables are used in conjunction with a TT87 jack, the shield should be
connected with low impedance to the b2 pin.
For a digital access (reference point U), the RJ45 jack is recommended (cf. Table 3). If shielded installation
cables are used, the shield should be connected with low impedance to the jack casing by means of the
protection sleeve provided. The RJ45 jack can also be used for an analogue access.
NT1 (Ib ref. S/T and Ia ref. U) currently uses RJ45 jacks (cf. Table 4).
Pin number
Interface
a/b
1a
2a
3a
1b
2b
3b
a
-
-
b
(Earth)
-
Table 1: Pin configuration for TT87 telephone socket
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Technical requirements for in-house
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Pin number
Interface
a/b
1
2
3
4
5
6
-
-
a
b
-
-
Table 2: Pin configuration for RJ11 (6P2C) telephone socket
Pin number
Interface
Sheath
1
2
3
4
5
6
7
8
U
-
-
-
a
b
-
-
-
(Earth)
a/b
-
-
-
a
b
-
-
-
(Earth)
Table 3: Pin configuration for RJ45 telephone socket
Pin number
Interface
1
2
3
4
5
6
7
8
U
-
-
-
a
b
-
-
-
S/T
-
-
Rx+
Tx+
Tx-
Rx-
-
-
Table 4: RJ45 pin configuration for NT1
2.6
Broadband Internet (DSL) socket
To enable the basic service to be provided with broadband Internet in the required quality on every wired
analogue network interface, the in-house installation must be designed in such a way (cf. Figure 1) that the
DSL signal is routed direct from the NSP to the NTU without being influenced by branch lines (branches for
other sockets, bad contacts, etc., bridge taps). Optimal signal routing within the in-house installation is
assured with installation of the RJ45 socket for broadband Internet (DSL).
This socket should be installed within the communications cabinet in residential units with structured
cabling infrastructure. An analogue access as described in Section 2.5 that is wired as shown in Figure 1
should always be installed in the same communications cabinet, at least for test purposes (cf. Figure 3).
With additional installations, or in new buildings without structured cabling infrastructure, the socket
should normally be installed in the study or otherwise in the living room.
Swisscom
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Block diagram:
Parents’ bedroom
Junction box
SO
Living room
SO
Broadband Internet (DSL)
RJ45 socket with
automatic bridge
JB/
TP=
NSP
Child’s room
Study
SO = TT87/RJ11/RJ45 socket
TP = Swisscom transfer point
JB = In-house junction box
Sp = Splitter
Twisted U 72 cable or
1x2 twisted Cat5 type cable
„Line“
& SO
SO
DSL Y-Cable
Sp
„Phone“
DSL analog Splitter
„Modem“
DSL-Router
Figure 2: Block diagram of an RJ45 broadband Internet (DSL) socket
Pin number
Interface
1
2
3
4
5
6
7
8
U from TP
-
-
-
a
b
-
-
-
In-house
a/b
-
-
a
-
-
b
-
-
Table 5: Pin configuration for the RJ45 broadband Internet (DSL) socket
The broadband Internet (DSL) socket (RJ45 jack) contains an automatic bridge from pin 3 to pin 4 and from
pin 5 to pin 6. This bridge takes effect in the absence of a splitter/modem RJ45 connector. At least the
front of the RJ45 jack should be coloured blue (Pantone blue 285C) to enable its function to be clearly
recognised.
Swisscom
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Technical requirements for in-house
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2.7
NTU for Broadband Internet (DSL)
A list of NTUs tested by Swisscom can be viewed at www.swisscom.com ->Wholesale ->"Broadband
Connectivity Service". In case of problems with the connection, the operational readiness of the broadband
Internet service at the NTP is demonstrated using a Swisscom NTU.
2.8
Access scenarios
ISDN
For MultiLINE
, please refer to the document "Interface of the Public Network" [1].
A terminal is supported with EconomyLINE. The document "Analogue subscriber line" [2] serves as a basis.
3
Annex: Broadband Internet (DSL) socket (examples)
Without
With D
Splitter
Modem
Figure 3: Connection diagram for broadband Internet (DSL) socket (example)
Figures 4-6: Market products, options (examples)
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Technical requirements for in-house
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1
2
4
5
3
6
7
8
Figure 7: Connection diagram for broadband Internet (DSL) socket (example)
RJ45 jack for broadband Internet (DSL) and TT83 for analogue telephone access
RJ45 jack for broadband Internet (DSL) and RJ45 (with RJ11 adapter) for analogue telephone access
Swisscom
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Technical requirements for in-house
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RJ45 jack broadband Internet (DSL) and RJ45 (with RJ11 adapter) for analogue telephone access plus 2xRJ45 for Fast Ethernet
Figures 8-13: Market products, options (examples)
Figures 14-17: DSL Y-Cable & Splitter, Market products, options (examples)
Swisscom
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