Up-grading method for transmission apparatus

• Main Authors: ITOH; NORIKO, SUGIOKA; TETSUYA, INADA; MANABU
• Format: Patent
• Language: English
• Published: 11.07.2000
• Edition: 7
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MULTIPLEX COMMUNICATION

An up-grading method for a transmission apparatus including at least one low-speed side interface device, at least one high-speed side interface device, and a cross connection or add/drop MUX device which has at least one of a function of multiplexing a signal from the low-speed side interface device to connect the multiplexed signal to the high-speed side interface device, a function of distributing a signal from the high-speed side interface device to the low-speed side interface device, and a function of establishing physical and logical signal paths between any low-speed side and any high-speed side interface devices. When the transmission speed of the high-speed side interface device is to be increased, a high-speed transmission apparatus having thereon an interface device having a higher interface speed, a cross connection or add/drop MUX device, a clock signal distributing device and a control device is newly connected to the cross connection or add/drop MUX device of the existing transmission apparatus, the high-speed side interface device of the existing transmission apparatus is replaced by a low-speed side interface device, the cross connection or add/drop MUX device of the existing transmission apparatus is interconnected to the newly added high-speed transmission apparatus, and the existing transmission apparatus is used as an exclusive apparatus for accommodation of low-speed side interfaces.