01 Tw2104eu01 Eg0001 General Features

8/13/2019 01 Tw2104eu01 Eg0001 General Features

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General Features of V5 Interface Siemens

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Contents

1 General Features of V5 Interface 1

1 Introduction...................................................................................................3

2 What is an Access Network........................................................................!

3 V5 Interface "asics.....................................................................................15# $%&ects of the V5 'ata "ase......................................................................2(

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1 General Features of V5 Interface

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Siemens General Features of V5 Interface

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1 Introduction

ETS 300 347-19/94

ETS 300 324-12/94

V5.1 Interface V5.2 Interface

Fi-. 1 Secifications for V5./ interface

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With the V5 interfaces the rotocol re0uirements for the interfaces within Access

Networks and %etween Access Network and ocal */chan-e * ha4e %eensecified.

)he V5.1 and V5.2 interfaces are open interfaces. )hat means usin- V5.1 orV5.2 interface it is ossi%le to link to the network node hardware roduced %6different manufacturers for the concentrated connection of su%scri%er lines. )hehardware for connectin- su%scri%er lines is descri%ed as the access network AN.

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S I * 7 * N S

N I 8 ' $ 9 F

Access Network *

V5.1

V5.2

V5.1

V5.1

V5.1

V5.2

Fi-. 2 :onnection %etween * and AN

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)he V5.1IFhas no concentration caa%ilit6 within the AN and uses onl6 one 2 7%it;s

link.

)he V5.2IFcan %e used arallel with the V5.1IF and is inherentl6 desi-ned toconcentrate user channels with a dedicated rotocol. V5.2IF ma6 use u to 1< / 27%it;s links on one interface.

Supported access types

analog subscribera;%= with and without meter ulses e.-. coin%o/es also.

analog PBsa;% without direct dialin-.

se!iper!anent connectionstransarent N+: with 64 "bit#s

$uro%IS&' basic access2">' with 'SS1 rotocol.

)he V5.2 interface ena%les a per!anent pac"et net(or" accessfor su%scri%ers)ia t*e & c*annel on basic access"A. " channel access "( or "1 is onl6suorted as a transarent


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2 What is an Access Network?

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With the hel of the Access Network AN different t6es of su%scri%er ser4ices and

user terminals are connected to the core network e.-. telehone comuter )V. )heaccess network is the direct link to the customers.

)he access network must %e a%le to work to-ether with 4arious comanies roductsin the core area as well as at the terminals themsel4es and therefore roduceinternationall6 standardiBed interfaces.

Some


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)heAccessAccess networknetworkANAN is the technolo-ical connection

%etween the core network and the su%scri%er terminals

Su%scri%erSu%scri%er :ore network:ore network

StandardStandardinterfacesinterfaces

)V Feadend

Switchin- center

'ata network

)elehon65data

Analo- )V'i-ital )V

Video ondemandFome shoin-

,'

7edia

Ser4er

Fi-. 3 AN , )he connection %etween su%scri%ers and the core network

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Various infrastructures can %e imlemented in the access area=

Increasin-l6 new %road%and technolo-ies are %ein- introduced for construction onan e/istin- coer infrastructure a;% 2,wire coer lines.

$tical transmission o4er otical fi%er is %ein- imlemented more and more in theconnection area.

*4en coa/ networks which were ori-inall6 lanned for the transmission of )V

ro-rams can %e used for transmittin- seech and data ser4ices.

If newl6,su%scri%ed customers need to %e connected to the core network as 0uickl6as ossi%le access solutions offer themsel4es to realiBe the Dlast mileE 4ia radiotransmission. )hese radio roducts are lanned and imlemented if a re-ionstoolo-6 does not allow ca%les to %e la6ed easil6.

*4en the ossi%ilit6 of usin- an e/istin- electrical ower network for the transmissionof telecommunication ser4ices is -oin- to %e introduced in the near future.

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Access networks can %e %ased on different technolo-ies

:oa/

$tical fi%erFi%er ;Fi%er ;:oa/:oa/)V telehon6 data ...

F Fi%er u%$N+ $tical Network +nit

+I* +ser Interface *0uiment

:oer $tical fi%er

Fi%er ;Fi%er ; :oer:oer)elehon6 data)V 4'5

)echnolo-6)echnolo-6 Su%scri%erSu%scri%er AccessAccessnetworknetwork

:oer:oer twisted air:oer twisted air)elehon6 data

5I$ F6

Fi-. # AN can %e %ased on different technolo-ies

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Access networks can %e %ased on different technolo-ies

Wireless ocal ooWireless ocal oo)elehon65 data5local mo%ilit6 ...

)echnolo-6)echnolo-6 Su%scri%erSu%scri%er AccessAccessnetworknetwork

?) ?owerline ine )ermination?N+ ?owerline Network +nit?N) ?owerline Network )ermination9"S 9adio "ase Station9N) 9adio Network )ermination)F )ransformer

?owerline?owerlinecommunicationcommunication)elehon65 data5Internet5 ...

/F

P7/P'

P'/


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3 V5 Interface Basics

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31 V51 Interface

A V5.1 interface accordin- to *)SI *)S 3((32# uses onl6 one 2 7%it;s link with a?:73( frame structure. $ne of the 32 timeslots accommodated in one ?:73$frame the timeslot ( is used to define the %e-innin- of new ulse frame.

)he timeslot 1< is fi/ed used to transmit the si-nalin- information. In case of a %i-amount of IS'N su%scri%ers the usa-e of further communication channels )S 15and )S 31 mi-ht %e necessar6 to ro4ide enou-h caacit6 for the transmission ofIS'N ',channel acket data.

/*e V5.1 does not concentrate9)hat means that each su%scri%er connected 4ia aV5.1 interface has its static relation to its timeslots. )hese timeslots are onceconfi-ured ermanentl6 acti4e and can not %e used %6 another su%scri%er.

)he ma/imum num%er of su%scri%ers of one V5.1 interface is=

3( analo-ue telehone su%scri%ers

15 IS'N 2">1' channel su%scri%ers

3( leased lines


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V5.1

( 1< 31

,ccess

'et(or"7$

SI *7 *NSNI 8 '$ 9 F

SI *7 *NSNI 8 '$ 9F

H one 2 7%it;s si-nal ?:7 3(

H u to 3 communication channels

a:i!u! nu!ber of subscribers

per V5.1 interface;

, analo-ue telehone access 3(

, IS'N "A 2">' 15, eased ines

e.-. as N+:


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32 V52 InterfaceA V5.2 interfaceaccordin- to *)SI *)S 3((3# e/ists of u to 1< / 2 7%it;s linkscalled V5lin"s with a ?:73( frame structure. If the V5.2 interface is used to connecta ocal */chan-e to an Access Network. *ach V5link consists of timeslots which arereser4ed as user channels ": ma/. 31. Furthermore at ma/. ##>#communication channels carr6 the si-nalin- information as well as control androtection information and the rotocol which is necessar6 for a d6namic timeslotallocation.

)he V5.2 interface secifies no fi/ed one to one su%scri%er,timeslot relations it is aconcentrating interface. )herefore it is ossi%le to connect u to #(J< su%scri%ers4ia one V5.2 interface in site of the lower num%er of a4aila%le user channels. Incase of usin- 1< / 2 7%it;s links for one V5.2 interface the num%er of #(J 2/ num%er of IS'N su%scri%ers K #(J' 2(#!

or an6 e0ui4alent mi/ture

V5.2

( 1< 31

1

1


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! "#$ects of the V5 %ata Base

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!1 "&er&iew

ulti%lin";a collection of more than one 2 (#! k%it;s link which to-ether make u aV5.2 interface althou-h a V5.2 interface need not ha4e more than one 2 (#! k%it;slink.

Pri!ary lin";the 2 (#! k%it;s link in a multi,link V5.2 interface whose h6sical :,channel in time slot 1< carries a :,ath for the rotection rotocol and on V5.2initialiBation also the :,ath for the control rotocol link control rotocol and the":: rotocol. $ther :,aths ma6 also %e carried in the time slot 1


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V5 I'/$8F,


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!2 'he V5 (rotocols

Protocol type+


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P84/4


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Signaling bet(een IS&'%/$and ,' in &%


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!3 (rotection Grou)s

A ?rotection -rou is a -rou of N > h6sical :,channels where is the num%erof h6sical :,channels which act as stand%6 :,channels for the N lo-ical :,channels.

'ifference %etween 4ital and non,4ital rotocols re-ardin- rotection switchin- e.-.durin- failure of a :: e.-. on account of V5IN failure

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:ommunication :hannel with 4ital or non,4ital rotocols rotection -rou 1=

)here is e/actl6 one acti4e :: and one corresondin- stand%6 :: for the 4italrotocols.

For rotection switchin-=

After correction of an error noswitch o4er %ack to the re4iousl6 acti4e ::.

:ommunication :hannel with non,4ital rotocols rotection -rou 2=

)here are &ust as man6 stand%6 :: as acti4e :: for the non,4ital rotocolsdetermined %6 oerator. )hese stand%6 :: form a ool for rotecti4e switchin-i.e. each can %e used as a su%stitute for each failed acti4e :: from the s6stem.

For rotecti4e switchin-= After correction of an error noswitch o4er %ack to there4iousl6 acti4e ::. owe4er it can also %e manuall6 switched o4er %6oerator.

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aster 7in"

e.-. )S 1< onIN 1 one acti)e


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)he allocation of a rotocol to an acti4e communication channel is done %6 creatin-

communication aths :,?A).


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ProtectionS(itc*ing


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Documents

01 Tw2104eu01 Eg0001 General Features