PURPOSE: To distribute a load on each inter-station line uniformly when a bypass transmission line is set and to transmit a series of packets with the same number on the same link by providing a bypass index selection table, etc.
CONSTITUTION: Packet terminals T11, T12 are housed in a packet switching machine (station) P1, and packet terminals T21, T22 in a packet switching machine(station) P2. When the bypass transmission line which transmits a reception packet on a bypass route is selected, the bypass index selection table 60 is retrieved by using the identification number CIDX of the reception packet. Next, by retrieving a line selection table from a bypass index stored in a retrieved address, a first bypass transmission line for the reception packet is selected. When transmission on the first bypass transmission line is disabled due to a fault, etc., a second bypass transmission line is selected by retrieving the line selection table with the value of a bypass index hunt counter. Thereby, the load on each line is distributed uniformly, and also, the same line is selected at every link, then the transmission is performed.
OE GENZABURO
YAMANAKA JUNJI
AOYAMA RYOICHI
NIPPON TELEGRAPH & TELEPHONE
| JPS62116041A | 1987-05-27 | |||
| JPH0373640A | 1991-03-28 |