System for effectively using ISDN backup channel
AssigneeFujitsu Limited
InventorMineo Okamura
Life of this patent
Estimating the term…
Abstract
A node of #B selects an ISDN line for backup in which a bulk transfer by a plurality of B channels is performed, out of a plurality of ISDN lines which can be set by a node of #A, by way of the pilot selection function on the ISDN switching network side. At this time, two nodes of #A and #B exchange both the child number of an ISDN line to be selected and the number of B channels to be transferred in bulk as user-user information in the D channel message of the ISDN line with each other, and select an ISDN line based on the information.
Claims14
An ISDN line selecting method of securing a backup line of a repeater line between connection nodes by connecting the connection nodes using an ISDN line being an integrated services digital network in which a bulk transfer of a plurality of B channels is performed to secure a required bandwidth, the bulk transfer by a pilot selection function where a setup message includes the pilot number of a destination apparatus and a number of B channels to be secured, comprising:
- selecting an ISDN line for backup in which a bulk transfer of a plurality of B channels is to be performed, out of a plurality of ISDN lines installed between connection node apparatuses by a the pilot selection function on an ISDN switching network side where the ISDN lines are switched;
- and
- selecting the ISDN line for backup, in which the bulk transfer of the plurality of B channels is performed, by exchanging a line number of the ISDN line to be selected, between the connection node apparatuses as user-user information in a D channel message of the ISDN line when the ISDN line is selected out of the plurality of ISDN lines installed between the connection node apparatuses.
A call controlling method of controlling calls from terminals connected to connection node apparatuses when a backup line of a repeater line is secured between the connection node apparatuses, by connecting the connection node apparatuses using an ISDN line being an integrated services digital network in which a bulk transfer of a plurality of B channels is performed to secure a required bandwidth, the bulk transfer by a pilot selection function where a setup message includes the pilot number of a destination apparatus and a number of B channels to be secured, comprising:
- managing a bandwidth of the ISDN line;
- managing a priority of each of the terminals;
- and
- controlling calls from each of the terminals based on both the bandwidth of the ISDN line and the priority of each of the terminals.
A connection node apparatus for controlling the securing of a backup line of a repeater line between connection node apparatuses by connecting the connection nodes using an ISDN line being an integrated services digital network in which a bulk transfer of a plurality of B channels is performed to secure a required bandwidth, the bulk transfer by a pilot selection function where a setup message includes the pilot number of a destination apparatus and a number of B channels to be secured, comprising:
- line number exchanging unit selecting an ISDN line for backup in which the bulk transfer of a plurality of B channels is performed, out of a plurality of ISDN lines installed between said connection node apparatuses by way of the pilot selection function on an ISDN switching network side where the ISDN lines are switched, and simultaneously exchanging a line number of an ISDN line to be selected, as user-user information in a D channel message of the ISDN line between the connection node apparatuses when the ISDN line is selected;
- and
- line selecting unit selecting an ISDN line for backup in which a bulk transfer of the plurality of B channels is performed, based on the exchanged line number.
A connection node apparatus for controlling calls from terminals connected to connection node apparatuses when a backup line of a repeater line is secured between the connection node apparatuses, by connecting the connection node apparatuses using an ISDN line being an integrated services digital network in which a bulk transfer of a plurality of B channels is performed to secure a required bandwidth, the bulk transfer by a pilot selection function where a setup message includes the pilot number of a destination connection node apparatus and a number of B channels to be secured, comprising:
- bandwidth managing unit managing a bandwidth of the ISDN line;
- terminal priority managing unit managing a priority of each of the terminals;
- and
- call controlling unit controlling calls from each of the terminals based on both the bandwidth of the ISDN line and the priority of each of the terminals.
A connection node apparatus for controlling the securing of a backup line of a repeater line between connection node apparatuses by connecting the connection nodes using an ISDN line being an integrated services digital network in which a bulk transfer of a plurality of B channels is performed to secure a required bandwidth, the bulk transfer by a pilot selection function where a setup message includes the pilot number of a destination connection node apparatuses and a number of B channels to be secured, comprising:
- line number exchanging means for selecting an ISDN line for backup in which the bulk transfer of a plurality of B channels is performed, out of a plurality of ISDN lines installed between said connection node apparatuses by way of a the pilot selection function on an ISDN switching network side where the ISDN lines are switched, and simultaneously exchanging a line number of an ISDN line to be selected, as user-user information in a D channel message of the ISDN line between the connection node apparatuses when the ISDN line is selected;
- and
- line selecting means for selecting an ISDN line for backup in which a bulk transfer of the plurality of B channels is performed, based on the exchanged line number.
A connection node apparatus for controlling calls from terminals connected to connection node apparatuses when a backup line of a repeater line is secured between the connection node apparatuses, by connecting the connection node apparatuses using an ISDN line being an integrated services digital network in which a bulk transfer of a plurality of B channels is performed to secure a required bandwidth, the bulk transfer by a pilot selection function where a setup message includes the pilot number of a destination connection node apparatus and a number of B channels to be secured, comprising:
- bandwidth managing means for managing a bandwidth of the ISDN line;
- terminal priority managing means for managing a priority of each of the terminals;
- and
- call controlling means for controlling calls from each of the terminals based on both the bandwidth of the ISDN line and the priority of each of the terminals.
Dependencies are inferred from the claim text.