摘要:
In a system for linking channel groups (ch1A to ch4A; CONT(8), OTL(8), TTL(8), MTL(8)) from various data terminals (1) in a sending station (MC) to corresponding data terminals (7-2, TST2) in a receiving station (LS), via digital telephone switching networks (5, 6), orderly connection of channels maintaining space order and time phase relationships between the channels of the group is accomplished by providing group trunks (A, B) - so named by the inventors - in each terminal station (1 , 7-2), to connect the data terminals to the telephone network. A group trunk (A) establishes a necessary number of channels between the sending and receiving trunks (A, B). The group trunk (A) of the sending station provides each sent data item with a channel identification code, identifying the channel through which the data item is sent out. The group trunk (B) of the receiving terminal detects the channel identification codes of received data, then rearranges the order of established channel paths arriving at the receiving terminal, and equalizes delay times of data sent via the different channel paths, to establish the space order and time phase relationships.
摘要:
A remote maintenance system for a digital communication network, comprises local offices (LOs) (1-1, 1-2) at least two of which are grouped and connected to each other by a local line (441) in the group and a centralized maintenance and operation center (CMOC) (3) located at a tandem office and connected to each LO (1-1, 1-2) by an ordinary digital transmission line (DTL) (511, 512) using No. 7 Common Channel Signaling (CCS) system recommended by CCITT. When a serious fault, such as system-down, occurs in an LO (first LO) (1-1) in the group, a serious alarm signal is sent from the first LO (1-1) to the CMOC (3) through the local line (511), another LO (second LO) (1-2) in the group and the DTL (512) connecting between the second LO (1-2) and the CMOC (3), so that maintenance data for repairing the serious fault are provided at the CMOC (3) and sent, under the No. 7 CCS system, to the first LO (1-1) through the DTL (551) toward the first LO (1-1) by providing means for sending the maintenance data without using switching network in the first LO (1-1) or through the DTL (512) toward the second LO (1-2), the second LO (1-2) and the local line (441).
摘要:
A remote maintenance system for a digital communication network, comprises local offices (LOs) (1-1, 1-2) at least two of which are grouped and connected to each other by a local line (441) in the group and a centralized maintenance and operation center (CMOC) (3) located at a tandem office and connected to each LO (1-1, 1-2) by an ordinary digital transmission line (DTL) (511, 512) using No. 7 Common Channel Signaling (CCS) system recommended by CCITT. When a serious fault, such as system-down, occurs in an LO (first LO) (1-1) in the group, a serious alarm signal is sent from the first LO (1-1) to the CMOC (3) through the local line (511), another LO (second LO) (1-2) in the group and the DTL (512) connecting between the second LO (1-2) and the CMOC (3), so that maintenance data for repairing the serious fault are provided at the CMOC (3) and sent, under the No. 7 CCS system, to the first LO (1-1) through the DTL (551) toward the first LO (1-1) by providing means for sending the maintenance data without using switching network in the first LO (1-1) or through the DTL (512) toward the second LO (1-2), the second LO (1-2) and the local line (441).
摘要:
In a system for linking channel groups (ch1A to ch4A; CONT(8), OTL(8), TTL(8), MTL(8)) from various data terminals (1) in a sending station (MC) to corresponding data terminals (7-2, TST2) in a receiving station (LS), via digital telephone switching networks (5, 6), orderly connection of channels maintaining space order and time phase relationships between the channels of the group is accomplished by providing group trunks (A, B) - so named by the inventors - in each terminal station (1 , 7-2), to connect the data terminals to the telephone network. A group trunk (A) establishes a necessary number of channels between the sending and receiving trunks (A, B). The group trunk (A) of the sending station provides each sent data item with a channel identification code, identifying the channel through which the data item is sent out. The group trunk (B) of the receiving terminal detects the channel identification codes of received data, then rearranges the order of established channel paths arriving at the receiving terminal, and equalizes delay times of data sent via the different channel paths, to establish the space order and time phase relationships.