Nokia Corporation

Nokia Networks Oy

Nokia Telecommunications Oy

Nokia Network Oy

Toivo Lallukka

Olli Liinamaa

Arto Rukaj&auml;rvi

Pekka Lehto

Timo Juntunen

Jyrki Suutari

Seppo Kuorelahti

Martti Yrj&auml;n&auml;

Pekka Korhonen

Leena Antila

Reijo Romppanen

Mika Haapea

Jaakko Rautiainen

Tiina Lehikoinen

Jaakko Saarela

Arto Rukajärvi

Timo Koskinen

Markku Juntunen

Sami Kultala

The present invention relates to a procedure for ensuring the operation of signalling channels in a V5 interface between a local exchange (LE) and an access node (AN). The interface includes at least two links (L), in conjunction with redefinition of the interface composition. Redefinition generally involves making changes in the V5 interface data, such as the location of signalling channels on the links. According to the invention, the operation of protected channels in conjunction with restarting is ensured by starting the protected channels on the channels defined for them in the new composition and on the channels to which they were transferred in conjunction with the protection switch-over.

Procedure for ensuring the operation of signalling channels in a V5 interface

The invention relates to a method and system for ensuring a PSTN protocol restart procedure as defined by the V5 standard after a failure of a first data link carrying PSTN protocol signalling messages. In the method, a first time-out (TC ) for starting the restart process is observed and, if the time-out has tripped, the restart procedure is started by sending a start message using a Control protocol signalling message consistent with the V5 standard. According to the invention, after the first data link carrying the PSTN protocol has been restored to working order, a check is carried out to establish whether a second data link intended to carry Control protocol signalling messages is in order, and this check is repeated until the second data link intended to carry Control protocol signalling messages is in order, and when the second data link is in order, a message for starting the PSTN protocol restart procedure is sent in the Control protocol.

Method and system for ensuring a PSTN protocol restart procedure as defined by the V5 standard

The invention concerns a method and a system for redefinition of the configuration of an interface in a telecommunication system comprising a local exchange, and access node, subscriber ports comprised in said network elements and an interface connecting the subscriber ports of the first network element to the subscriber ports of the second network element. In the method, free subscriber ports are blocked and the configuration of the interface is redefined after all the subscriber ports have been blocked. According to the invention, a connection established or being established via the subscriber port is disconnected before the port is blocked. The system of the invention comprises means for disconnecting a connection established or being established via the subscriber port.

Method and system for reconfiguration of an interface

The invention relates to a system and a method for implementing ISDN user port status monitoring in a network element transmitting messages in a cascaded V5 interface. In an embodiment of the invention, ISDN user port activation messages are transmitted unaltered through the message transmitting network element when the current state of the ports is other than the BLOCKED state consistent with the V5 definitions.

Method for implementing ISDN user port status monitoring

Method for concentrating subscribers in a local exchange (LE), which comprises an exchange terminal ( ), a V5 interface (V5) connected to the exchange terminal, a group switch ( ) and an interconnecting line ( ) between the exchange terminal and the group switch for connecting subscribers connected to the exchange terminal to the group switch. According to the invention, a number of V5 interfaces (V5) are connected to the exchange terminal ( ) and the exchange terminal is connected to the group switch ( ) via the interconnecting line ( ), thus forming between the exchange terminal and the group switch an internal interface within the local exchange for concentrating V5 subscribers.

Method for concentrating subscribers in a local exchange

A procedure for concentrating subscribers in a telephone network comprising a local exchange (LE) provided with a first exchange terminal (1), a remote subscriber stage (RSS) provided with a second exchange terminal (2), a V5 interface (V5) connected to the second exchange terminal, and an interconnecting feeder (3) between the first and second exchange terminals through which subscribers connected via the V5 interface to the second exchange terminal are connected to the local exchange. According to the invention, a number of V5 interfaces (V5) are connected to the second exchange terminals (2) and the second exchange terminal is connected via the interconnecting feeder (3) to the first exchange terminal (1), thus forming a concentrating interface between the first and second exchange terminals.

Method for concentrating subscribers in a telephone network

Procedure for releasing the connection between a user port and an associated channel, or voice time slot, in an access node (AN) connected to a local exchange (LE) via a V5.2 interface. According to the invention, in a situation where there is a break in the V5.2 interface signalling channels, the connection between a user port and the associated channel may be left unreleased. In this case, the unsuccessful release of the connection between the subscriber port and the associated channel is stored in memory and the operation for releasing the connection between the subscriber port and the associated channel is carried out again.

Procedure for releasing connections

Procedure for accomplishing PSTN-mapping in a telecommunication system comprising a telephone exchange (LE) with a number of subscribers defined in it, a first access node (AN,), which is connected to the telephone exchange via a first V5 interface (V5), a second access node (AN,), which is connected to the first access node (AN,) via a second V5 interface (V5&prime;), and terminal equipment (TE) connected to the second access node (AN,), the connection between the subscriber and the telephone exchange (LE) being set up by cascading the two V5 interfaces. The signalling sequences and message decoding in PSTN-mapping are exclusively taken care of by the telephone exchange (LE) and the second access node (AN,), and the signalling is transmitted transparently through the first access node (AN,) without the first access node participating in the decoding of the signalling.

Procedure for providing a pstm-mapping in a telecommunication system

Procedure for subscriber addressing in a cascaded V,interface in a data communication system comprising a telephone exchange (LE) with a number of subscribers defined in it, and access network (AN) connected to the telephone exchange via a first V,interface (V,) and comprising a first access node (AN,), a second access node (AN,), which is connected to the telephone exchange, and a subscriber terminal (TE), which is connected to the local exchange via the access network and/or the second access node. According to the invention, the second access node (AN,) is connected to the first access node (AN&excl;) via a second V,interface, the connection between the subscriber and the telephone exchange (LE) being set up by cascading the two V,interfaces, subscriber parameters comprising an identifier of the first V,interface (V,) and an identifier of the second V,interface (V,&prime;) and the subscriber's L,address consistent with the V,definitions are defined for each subscriber, the signalling between the subscriber and the telephone exchange being effected using the first and second V,interfaces in accordance with the identifiers.

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Oulu, Finland

Toivo Lallukka