Alcatel

Alcatel Lucent

Christian Laroque

Lahcen Bennai

Jacques Litteaut

A telephone access () includes a signaling channel (). A substitute channel () or substitute channels () can be added to the signaling channel and used when the signaling channel is down. It is shown that this makes the telephone access more suitable for a separate signaling channel access or hybrid access configuration.

Communication method using one access

To simplify the sending of signalling messages, a coupler of a switch is provided with an interpreter. The interpreter is capable of preparing the sending of a signalling message as soon as it receives an order of predetermined syntax. By acting in this way, the transmission of signalling messages is made transparent to the variety of protocols that might be used.

Switch provided with a signaling coupler, and a method of sending a signaling message

To solve the problems of sending signaling signals () between exchanges () which are interconnected by links () which have no facility for sending signaling signals conforming to the ISDN standard, the necessary signaling channel is simulated on a supplementary channel. In this case, the signaling data () formatted in accordance with the ISDN standard is converted into data formatted in accordance with said other channel on transmission and restored to its original format on reception. It is shown that this approach can overcome the hybrid nature of the links between two exchanges conforming to the ISDN standard. The exchanges include software conforming to the ISDN standard for which the link between exchanges becomes transparent.

Method of transmitting signaling data

To monitor the use of a chargeable dynamic signaling port of a trunk connecting two exchanges, in particular in connection with applications which communicate via exchanges and which are likely to require to use such ports, rights of use are assigned to each application enabling it either to have a port of this kind set up and then to use it, or only to use a port of this kind if it has already been set up.

Method of monitoring the use of a chargeable dynamic signaling port of an inter-exchange trunk

To solve problems of standardization in signaling channels, which are becoming inextricable because of the proliferation of manufacturers and services, telephone configuration instructions are sent on data channels. Telephone central office receiving circuits include means for detecting in received messages an indication as to whether the received message must be interpreted as a modification instruction or as a normal data message.

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Rueil Malmaison, France

Christian Laroque