WPCL 2BJ|x H   X  6p&6p&   H   c4 P  Fascicle VII.2 - Rec. U.140 PAGE1   HH   c4 P PAGE1 Fascicle VII.2 - Rec. U.140  HH Hp P X`h!(# X    c4 P Recommendation U.140 8> c4 P DEFINITIONS OF ESSENTIAL TECHNICAL TERMS 8;RELATING TO TELEGRAPH SWITCHING AND SIGNALLING  H HP X`h!(#Ё c4 P  The definitions given below have been identified as necessary for studies in the field of telegraph switching and signalling.  H Hp P X`h!(# Sub-numbers in the 721.XX.YY range signify correspondence with definitions in the International Electrotechnical Vocabulary (IEV) of the International Electrotechnical Commission (IEC).  H  Sub-numbers in the range 35.ZZ or 37.ZZ signify definitions derived from the ITU List of Definitions of Essential Telecommunications Terms. HP X`h!(#Ђ 1X public telegraph network Hp P X`h!(# hpF: r)seau t)l)graphique public  hpS: red telegrfica pblica  H  A telecommunication network set up to perform a telegraph service for the public.  H  Note - A public telegraph network is supplied, operated and controlled by an Administration or recognized private operating agency. `p&I 721.51.01 HP X`h!(#2X Gentex network Hp P X`h!(# hpF: r)seau Gentex  hpS: red g)ntex  H  Switched telegraph network used between Administrations or recognized private operating agencies to provide an international public telegram service. `p&I 721.51.02 HP X`h!(#3X subscriber's line; subscriber loop Hp P X`h!(# hpF: ligne d'abonn); ligne de rattachement  hpS: l1nea de abonado; bucle de abonado  H  A link between equipment in a subscriber's premises and the local telecommunication centre providing required services. `%G 721.51.03 HP X`h!(#4X dedicated circuit (in telegraphy and data transmission)  H Hp P X`h!(# hpF: liaison sp)cialis)e (en t)l)graphie et transmission de donn)es)  H  hpS: circuito especializado (circuito dedicado) (en telegraf1a y transmisi;n de datos  H  A telegraph link established permanently without the use of switching facilities and dedicated to the exclusive use of a set of terminals. `p&I 721.51.05HP X`h!(#  5international circuit Hp P X`h!(# hpF: circuit international  hpS: circuito internacional  H  A circuit directly connecting two exchanges situated in different countries. `%G 721.51.06 HP X`h!(#6X intercontinental circuit Hp P X`h!(# hpF: circuit intercontinental  hpS: circuito intercontinental  H  A circuit connecting two exchanges situated in different countries on different continents. `p&I 721.51.07 HP X`h!(#7X set (group) of circuits Hp P X`h!(# hpF: faisceau de circuits  hpS: haz (grupo) de circuitos  H  A group of circuits established between two exchanges, any circuit of which may be chosen without preference for the setting up of a connection. `p&I 721.51.08 HP X`h!(#8X private network (in telegraphy) Hp P X`h!(# hpF: r)seau priv) (en t)l)graphie)  hpS: red privada (en telegraf1a)  H  A group of terminals that can establish calls between one another without passing through the switching equipment of the public network. `p&I 721.51.09 HP X`h!(#9X overflow position (in a private network) Hp P X`h!(# hpF: poste principal d'un r)seau priv)  hpS: posici;n de desbordamiento (en una red privada)  H  A nominated terminal of a private network to which an incoming call is redirected if the terminal identification has been omitted or if connection to the selected terminal is not possible. `p&I 721.51.10 HP X`h!(#10  closed private network Hp P X`h!(# hpF: r)seau priv) ferm)  hpS: red privada cerrada  H  A private network that does not permit intercommunication other than between terminals connected to it. `p&I 721.51.11HP X`h!(#  11interworking between networks Hp P X`h!(# hpF: interconnexion de r)seaux  hpS: interfuncionamiento de redes  H  The means whereby terminals connected to a telecommunication network may communicate with terminals of another network. `p&I 721.51.12 HP X`h!(#12  path Hp P X`h!(# hpF: chemin  hpS: trajecto  HH  In a telegraph network, a route between any two exchanges. `(#B 721.51.21 HP X`h!(#13  (terminal) port Hp P X`h!(# hpF: acc/s  hpS: puerto (acceso)  H  A functional unit of an exchange through which signals can enter or leave a network. `p&I 721.51.22 HP X`h!(#14  circuit-switched connection Hp P X`h!(# hpF: liaison commut)e  hpS: conexi;n conmutada de circuitos  H  A temporary connection that is established on request between two or more stations in order to allow the exclusive use of that connection until it is released. `p&I 721.51.24 HP X`h!(#15  multipoint connection Hp P X`h!(# hpF: liaison multipoint  hpS: conexi;n multipunto  HH  A connection established between three or more stations. `(#B 721.51.25 HP X`h!(#16  point-to-point connection Hp P X`h!(# hpF: liaison point ! point  hpS: conexi;n punto a punto  A connection established between only two stations. `(#B 721.51.26HP X`h!(#  17connection Hp P X`h!(# hpF: cha3ne de connexion  hpS: conexi;n  H  A temporary association of channels or circuits, switching and other functional units set up to provide for the transfer of information between two or more points in a telecommunication network. `p&I 721.52.01 `p&M 37.18 HP X`h!(#18  (complete) connection  HX Hp P X`h!(# hpF: cha3ne de connexion compl/te; (chemin de) communication  hpS: conexi;n (completa)  H  A temporary association of channels or circuits, switching and other functional units set up to provide for the transfer of information between terminals in a telecommunication network. `p&I 721.52.02 HP X`h!(#19  (telex) call Hp P X`h!(# hpF: communication (t)lex)  hpS: llamada (t)lex); comunicaci;n (t)lex)  H  The establishment and possible use of a complete connection by connected telex terminals. `p&I 721.52.03 HP X`h!(#20  subscriber serving exchange Hp P X`h!(# hpF: commutateur de rattachement  hpS: central de servicio de abonados  H  A public switching exchange which connects subscribers in a same area to one another, or which establishes connection between them and the other exchanges. `p&I 721.52.04 HP X`h!(#21  transit exchange Hp P X`h!(# hpF: commutateur nodal t)l)graphique  hpS: centro de trnsito  H  A telegraph exchange which enables connections between other telegraph exchanges to be established. `p&I 721.52.05 HP X`h!(#22  telegraph switching exchange Hp P X`h!(# hpF: centre de commutation t)l)graphique  hpS: centro de conmutaci;n telegrfica  H  The set of equipments installed at a single location to switch telegraph traffic. `p&I 721.52.06 HP X`h!(#23  sub-centre Hp P X`h!(# hpF: sous-centre  hpS: subcentro  H  A switching centre which serves a group of terminals and concentrates the traffic from this group towards a larger parent switching centre in which it is dependent for the routing of the whole of its traffic. `p&I 721.52.08 `p&M 35.02 HP X`h!(#24  line concentrator Hp P X`h!(# hpF: concentrateur de lignes  hpS: concentrador de l1neas  Hx  A switching equipment remotely located in a local line network and enabling the traffic between the subscriber serving exchange and a number of subscribers to be carried by a smaller number of lines.  H  Note - A compatible equipment must normally be provided at the subscriber serving exchange. `p&I 721.52.09 `p&M 35.09 HP X`h!(#25  trunk circuit Hp P X`h!(# hpF: circuit interurbain  hpS: circuito interurbano  H  Telegraph circuit between two telegraph exchanges not belonging to the same local network. HP X`h!(#Ђ 26  telegraph junction circuit Hp P X`h!(# hpF: jonction de sous-centre  hpS: circuito telegrfico de enlace  H  A telegraph circuit connecting a sub-centre with its parent switching centre. `p&I 721.52.11 `p&J 35.12(a) HP X`h!(#27  overline service Hp P X`h!(# hpF: groupement de lignes  hpS: servicio de l1neas agrupadas  H  Several subscriber line circuits grouped under the same address in such a way that a call to that address may reach any of the free lines of the group. `p&I 721.52.12 HP X`h!(#28  overflow (in telegraphy) Hp P X`h!(# hpF: d)bordement (en t)l)graphie)  hpS: desbordamiento (en telegraf1a)  H  Redirection by the network of calls or messages to a designated position, when a connection to the called position cannot be established, with a view to a later retransmission. 721.52.13 `p&M 35.10 HP X`h!(#29  circuit switching Hp P X`h!(# hpF: commutation de circuits  hpS: conmutaci;n de circuitos  H  The temporary connection of two or more terminals upon request providing the exclusive use of a complete connection until it is released. `p&I 721.52.14 HP X`h!(#30  message switching; store and forward switching Hp P X`h!(# hpF: commutation de messages; messagerie  hpS: conmutaci;n de mensajes; conmutaci;n en el servicio de almacenamiento y retransmisi;n  H  The process of routing messages comprising, in certain nodes of the network, a receiving, storing as necessary, and forwarding of messages within a telecommunication network. `p&I 721.52.15 HP X`h!(#31  reperforator switching Hp P X`h!(# hpF: commutation avec retransmission par bande perfor)e  hpS: conmutaci;n con retransmisi;n por cinta perforada  H  A tape relay system in which the tape from a reperforator feeds directly into a permanently associated automatic transmitter which can be switched to an outgoing channel.  Note - This switching may be manual, automatic or semi-automatic. `p&I 721.52.17 `p&M 35.03 HP X`h!(#32  character switching Hp P X`h!(# hpF: commutation de caract/res  hpS: conmutaci;n de caracteres  H  The temporary connection of two or more terminals upon request using a process of storing and transferring character by character from one line to another. `p&I 721.52.18 HP X`h!(#33  circuit switching exchange; switch (circuit)  c4 P  Hp P X`h!(# hp c4 P  F: commutateur de circuits  H  hpS: centro de conmutaci;n de circuitos; conmutador (de circuitos)  HH  A set of devices associated with a set of circuits intended to interconnect temporarily on request such circuits to constitute connections. `(#B 721.52.19 HP X`h!(#34  message switching exchange; switch (message)  c4 P  -ƌHp P X`h!(# hp c4 P  F: commutateur de messages  Hx  hpS: centro de conmutaci;n de mensajes; conmutador (de mensajes)  H  A set of devices associated with a set of circuits intended to receive, store as necessary, and forward messages without providing any exclusive connection between circuits. `p&I 721.52.20 HP X`h!(#35  national subscriber's telex number Hp P X`h!(# hpF: num)ro t)lex national d'abonn)  hpS: nmero t)lex nacional de abonado  H  A sequence of digits that a caller must normally select to connect to a called subscriber situated in the same country. `p&I 721.52.21 HP X`h!(#36  local telex number Hp P X`h!(# hpF: num)ro t)lex local  hpS: nmero de t)lex local  H  A sequence of digits shorter than the national subscriber's telex number used to connect a called subscriber situated in a restricted geographical area. `p&I 721.52.22 HP X`h!(#37  alternative selection signals Hp P X`h!(# hpF: pluralit) des codes de signaux de s)lection  hpS: pluralidad de se9ales de selecci;n  H  The acceptance by the network of several different codes for selection signals, e.g. International Telegraph Alphabet No. 2 and International Alphabet No. 5, the choice of code being either fixed for a given subscriber, or variable at the subscriber's choice, for each call attempt. `p&I 721.52.28 HP X`h!(#38  prefix giving access to the long distance telex network Hp P X`h!(# hpF: pr)fixe d'acc/s ! grande distance  hpS: prefijo de acceso a la red t)lex de larga distancia  H  A digit or sequence of digits giving access to the remainder of the national telex network from an area inside which local telex numbers are used. `p&I 721.52.29 HP X`h!(#39  prefix giving access to the international telex network Hp P X`h!(# hpF: pr)fixe d'acc/s ! l'international  hpS: prefijo de acceso a la red t)lex internacional  H  A digit or a sequence of digits that must be selected by a subscriber, possibly after the prefix giving access to the long distance telex network, to connect with the international network. `p&I 721.52.30 HP X`h!(#40  prefix giving access to the intercontinental telex network Hp P X`h!(# hpF: pr)fixe d'acc/s ! l'intercontinental  hpS: prefijo de acceso a la red t)lex intercontinental  H  A digit or a sequence of digits that must be selected by a subscriber, possibly after the prefix giving access to the long distance telex network, to connect with the intercontinental network. `p&I 721.52.31HP X`h!(#  41destination code Hp P X`h!(# hpF: code t)lex de destination  hpS: c;digo de destino  Hh  A sequence of digits identifying the country in which the called subscriber is located or a specified network in that country.  H  Note - The telex destination codes have been fixed by Recommendation F.69. `p&I 721.52.32 HP X`h!(#42  international selection sequence Hp P X`h!(# hpF: num)ro de batterie  hpS: secuencia de selecci;n internacional  Hh  First sequence of digits in an international two-stage selection. `%F 721.52.33 HP X`h!(#43  international two-stage selection Hp P X`h!(# hpF: num)rotation internationale en deux temps  hpS: selecci;n internacional de dos etapas  H  The process of establishing international calls using two sequences of digits, the first sequence characterizing the called country or network, and the second sequence characterizing the called subscriber in that country or network. `p&I 721.52.34 HP X`h!(#44  traffic routing (in circuit switching)  c4 P  Hp P X`h!(# hp c4 P  F: acheminement (en commutation de circuits)  HX  hpS: encaminamiento de trfico (en conmutaci;n de circuitos)  H  Designating in accordance with given rules the set of circuits to be used for setting up a connection from a given exchange for a given call attempt. `p&I 721.52.36 HP X`h!(#45  normal (traffic)  c4 P routing Hp P X`h!(# hp c4 P  F: acheminement normal  hpS: encaminamiento normal (de trfico)  H  Designating in accordance with given rules the set of circuits on a first priority basis from which a circuit is to be selected, provided that a free circuit exists in that set for a given call attempt. `p&I 721.52.37 HP X`h!(#46  alternative traffic routing Hp P X`h!(# hpF: acheminement d)tourn); d)tournement  hpS: encaminamiento alternativo (de trfico)  H  Designating in accordance with given rules the set of circuits to be taken in the case where no circuit is available in the set of normal traffic routing circuits for a given call attempt. `p&I 721.52.38 HP X`h!(#47  first choice set of circuits Hp P X`h!(# hpF: faisceau de premier choix  hpS: haz de circuitos de primera elecci;n  H  A set of circuits to be used on a first priority basis if a free circuit from this set is available. `p&I 721.52.39 HP X`h!(#48  emergency routing Hp P X`h!(# hpF: acheminement de secours  hpS: encaminamiento de emergencia  H  The routing to be chosen exceptionally if neither the normal traffic routing nor any alternative traffic routing set of circuits is available. `p&I 721.52.40 HP X`h!(#49  re-routing Hp P X`h!(# hpF: r)acheminement  hpS: reencaminamiento  H  In case of congestion in a transit exchange, the re-direction of the call backwards to a preceding exchange in the already partly established connection with a view to finding an alternative traffic routing from that exchange. `p&I 721.52.41 HP X`h!(#50  switching signal Hp P X`h!(# hpF: signal de commutation  hpS: se9al de conmutaci;n  H  A signal transmitted between two exchanges or between one exchange and a terminal for establishing and clearing a call. `p&I 721.52.42 HP X`h!(#51  forward switching signal Hp P X`h!(# hpF: signal (de commutation) vers l'avant  hpS: se9al de conmutaci;n hacia adelante  H  A switching signal transmitted in the direction from the caller to the called party. `p&I 721.52.43 HP X`h!(#52  return switching signal Hp P X`h!(# hpF: signal (de commutation) vers l'arri/re  hpS: se9al de conmutaci;n hacia atrs  H  A switching signal transmitted in the direction from the called party to the caller. `p&I 721.52.44HP X`h!(#  53free circuit condition Hp P X`h!(# hpF: )tat de disponibilit)  hpS: estado de circuito libre  H  The characteristic state of a circuit available for the setting up of a call. `p&I 721.52.45 `p&M 35.13 HP X`h!(#54  calling signal Hp P X`h!(# hpF: signal d'appel  hpS: se9al de llamada  H  A forward switching signal retransmitted on a circuit or a subscriber's line to indicate that the setting up of a call is requested. `p&I 721.52.50 `p&M 35.15 HP X`h!(#55  call control procedure Hp P X`h!(# hpF: proc)dure de commande d'appel  hpS: procedimiento de control de la llamada  H  The entire set of interactive signals necessary to establish, maintain and release a call. `p&I 721.52.51 HP X`h!(#56  call-confirmation signal Hp P X`h!(# hpF: signal de confirmation d'appel  hpS: se9al de confirmaci;n de llamada  H  A return switching signal, in response to a calling signal, to acknowledge the receipt of the calling signal. `p&I 721.52.52 `p&M 35.16 HP X`h!(#57  call accepted signal Hp P X`h!(# hpF: signal d'acceptation d'appel  H  hpS: se9al de llamada aceptada; se9al de aceptaci;n de la llamada  H  A signal sent over the return channel, indicating that the call can be accepted by a terminal. `p&I 721.52.53 HP X`h!(#58  selection signals Hp P X`h!(# hpF: s)quence de s)lection  hpS: se9ales de selecci;n  H  A sequence of forward signals giving to an exchange information necessary to the setting up of a call. `p&I 721.52.54 HP X`h!(#59  address (in circuit switching) Hp P X`h!(# hpF: adresse (en commutation de circuits)  hpS: direcci;n (en conmutaci;n de circuitos)  H  The part of the selection signals which indicates the destination of a call. `p&I 721.52.55 HP X`h!(#60  address (in information processing)  c4 P  Hp P X`h!(# hp c4 P  F: adresse (en traitement de l'information)  hpS: direcci;n (en tratamiento de la informaci;n)  H  A character or group of characters that identifies a storage or a device without the use of any intermediate reference. `p&I 721.52.56 HP X`h!(#61  processed-to-select signal Hp P X`h!(# hpF: signal d'invitation ! num)roter  hpS: se9al de invitaci;n a marcar  H  A return switching signal transmitted by an exchange in response to a calling signal or after a call-confirmation signal to indicate that the exchange is ready to receive the selection signals. `p&I 721.52.57 `p&M 35.17 HP X`h!(#62  (user)  c4 P class of service signal Hp P X`h!(# hp c4 P  F: signal de cat)gorie  hpS: se9al de clase de servicio (de usuario)  H  A character or group of characters among the selection signals identifying the user's class of service of the calling party. `p&I 721.52.58 HP X`h!(#63  pre-signal Hp P X`h!(# hpF: pr)signal  hpS: prese9al  H  A class of service signal transmitted at the beginning of the selection signals. `p&I 721.52.59 HP X`h!(#64  post-signal Hp P X`h!(# hpF: postsignal  hpS: postse9al  Hx  A class of service signal transmitted after the sequence of digits characterizing the called terminal. `%H 721.52.60HP X`h!(#  65end of selection signal Hp P X`h!(# hpF: signal de fin de s)lection  hpS: se9al de fin de selecci;n  H  A switching signal transmitted among the selection signals after the digits of the called subscriber's number to indicate that there is no further digit belonging to this number. `p&I 721.52.61 HP X`h!(#66  keyboard selection Hp P X`h!(# hpF: num)rotation au clavier (en t)l)graphie)  hpS: selecci;n por teclado (marcaci;n por teclado)  H  In automatic telegraph switching, the use of telegraph alphabet signals sent from the teleprinter's keyboard or from an automatic equipment to form the selection sequence. `p&I 721.52.62 HP X`h!(#67  dial selection (in telegraph) Hp P X`h!(# hpF: num)rotation au cadran (en t)l)graphie)  Hh  hpS: selecci;n por disco (marcaci;n por disco) (en telegraf1a)  H  In automatic telegraph switching, the use of dial pulse trains from a dial or an automatic equipment to form the selection sequence. `p&I 721.52.63 HP X`h!(#68  call-connected signal Hp P X`h!(# hpF: signal de communication )tablie  hpS: se9al de comunicaci;n establecida  Hx  The switching signal returned over the backward signalling path to indicate that the call is extended to the called station. `%H 721.52.64 `%L 35.19 HP X`h!(#69  clearing signal Hp P X`h!(# hpF: signal de lib)ration  hpS: se9al de liberaci;n  H  The switching signal transmitted over a circuit to release a switched connection. `p&I 721.52.65 `p&M 35.20 HP X`h!(#70  confirmation of clearing signal Hp P X`h!(# hpF: signal de confirmation de lib)ration  hpS: se9al de confirmaci;n de liberaci;n  H  Return switching signal which indicates that the clearing signal has been executed. `p&I 721.52.66 HP X`h!(#71  service signal Hp P X`h!(# hpF: signal de service  hpS: se9al de servicio  H  Signal transmitted automatically by the network to the calling terminal indicating the progress of a call or the cause of failure of the call attempt. `p&I 721.52.67 HP X`h!(#72  engaged; busy signal Hp P X`h!(# hpF: signal d'occupation  hpS: se9al de ocupado; se9al de ocupaci;n  H  A busy signal which indicates that the called station is busy or not available. `p&I 721.52.68 HP X`h!(#73  barred signal Hp P X`h!(# hpF: signal d'interdiction  hpS: se9al de acceso prohibido  H  A service signal which indicates that a call cannot be established because access is barred. `p&I 721.52.69 HP X`h!(#74  call set-up time Hp P X`h!(# hpF: temps d')tablissement d'une communication  hpS: tiempo de establecimiento de la comunicaci;n  H  The interval of time between the sending of the calling signal by the calling party and the reception of the call-connect signal. `p&I 721.52.70 HP X`h!(#75  pre-selection delay Hp P X`h!(# hpF: temps de pr)s)lection  hpS: tiempo de preselecci;n  H  The interval of time between the sending of the calling signal by the calling party and the reception of the proceed-to-select signal. `p&I 721.52.71 HP X`h!(#76  selection time Hp P X`h!(# hpF: temps de num)rotation  hpS: tiempo de selecci;n (tiempo de marcaci;n)  H  The interval of time between the reception by the calling party of the proceed-to-select signal and the end of reception by the exchange of the selection sequence. `p&I 721.52.72HP X`h!(#  77post-selection time Hp P X`h!(# hpF: temps de s)lection  hpS: periodo de espera despu)s de marcar  H  The interval of time between the end of the sending of the selection sequence by the calling party and the reception of the call-connect signal. `p&I 721.52.73 HP X`h!(#78  effective duration of a call Hp P X`h!(# hpF: dur)e d'une communication  hpS: duraci;n efectiva de una comunicaci;n  H  The interval of time between the reception by the calling party of the call-connect signal and the sending of the clearing signal. `p&I 721.52.74 HP X`h!(#79  stored program control (SPC) Hp P X`h!(# hpF: commande par programme enregistr)  hpS: control por programa almacenado (CPA)  H  The control of an exchange by means of a set of instructions which are stored and can be modified. `p&I 721.52.75 HP X`h!(#80  common channel signalling  H Hp P X`h!(# hpF: signalisation par canal s)maphore; signalisation sur voie commune  hpS: se9alizaci;n por canal comn  H  A signalling method in which signalling information relating to a multiplicity of circuits is conveyed over a single channel by labelled messages. `%G 721.52.76 HP X`h!(#81  channel associated signalling Hp P X`h!(# hpF: signalisation voie par voie  hpS: se9alizaci;n asociada al canal  H  A signalling method in which the signals for the traffic carried by a single transmission channel are transmitted over that channel itself or over a signalling channel permanently associated with it.  Note - This term may also apply when the signals for a circuit are transmitted over the channel carrying the traffic. `p&I 721.52.77 HP X`h!(#82  call clearing delay Hp P X`h!(# hpF: temps de lib)ration  hpS: tiempo de liberaci;n de la llamada  H  The interval of time between the beginning of the sending of the clearing signal by a terminal and the appearance of the free circuit condition on the return line. `p&I 721.52.78 HP X`h!(#83  unsuccessful call Hp P X`h!(# hpF: appel infructueux  hpS: llamada infructuosa  H  A call attempt which does not result in the establishment of a complete connection. `p&I 721.52.79 HP X`h!(#84  call not accepted signal Hp P X`h!(# hpF: signal de refus d'appel  hpS: se9al de rechazo de la llamada  H  A call control signal sent by the called terminal to indicate that it does not accept the incoming call. `p&I 721.52.80 HP X`h!(#85  lost call Hp P X`h!(# hpF: appel perdu  hpS: llamada perdida  H  A request for a connection which is rejected due to network congestion. `p&I 721.52.81 HP X`h!(#86  head-on collision Hp P X`h!(# hpF: double prise (sur circuit mixte); collision frontale  hpS: colisi;n frontal  H  The condition which exists when, on a transmission path capable of being used to set up calls in both directions, the path is seized from both ends simultaneously or nearly so. The seizure of the path by the distant end is not apparent, due to propagation delays. `p&I 721.52.82 HP X`h!(#87  terminal connection method (in telex)  c4 P  Hp P X`h!(# hp c4 P  F: mode de raccordement (en t)lex)  hpS: m)todo de conexi;n del terminal (en t)lex)  H  The characteristics of the interface between a telex subscriber's line and a subscriber-serving exchange. `p&I 721.52.83 HP X`h!(#88  speed converter concentrator Hp P X`h!(# hpF: concentrateur-diffuseur  hpS: concentrador convertidor de velocidad  H  The temporary storing of data arriving from slow channels and their retransmission on high speed channels and vice versa. `p&I 721.52.84HP X`h!(#  89system control station Hp P X`h!(# hpF: centre directeur  hpS: estaci;n de control del sistema  H  Station which is responsible for maintenance and clearance of faults on a transmission system. `p&I 721.52.86 HP X`h!(#90  indication of duration Hp P X`h!(# hpF: indication de dur)e  hpS: indicaci;n de duraci;n  H  The indication by the network to the paying terminal of the chargeable time of a call prior to the release of the paying terminal or by recall at a convenient time.  Note - This information may be provided automatically or on demand. `p&I 721.53.32