Nec Corporation

Juniper Networks, Inc.

Senju Metal Industry Co., Ltd.

Hiroyuki Iwamoto

Hiroshi Okada

Masato Tsuchiya

Daisuke Souma

Shigeki Kondoh

A core material has a core; a solder layer provided outside the core and being a solder alloy containing Sn and at least any one element of Ag, Cu, Sb, Ni, Co, Ge, Ga, Fe, Al, In, Cd, Zn, Pb, Au, P, S, Si, Ti, Mg, Pd, and Pt; and a Sn layer provided outside the solder layer. The solder layer has a thickness of 1 &#x3bc;m or more on one side. The Sn layer has a thickness of 0.1 &#x3bc;m or more on one side. A thickness of the Sn layer is 0.215% or more and 36% or less of the thickness of the solder layer.

Core material, electronic component and method for forming bump electrode

An ATM switch allowing simplified OAM processing only on the line incoming side is disclosed. An incoming line circuit has a header conversion table storing information indicating whether the system is an end point of an OAM processing flow for each connection and an OAM table storing an AIS flag and an RDI flag for each connection. As for an OAM cell found by referring to these tables to be forced to go back to its own port, an switch output port number is rewritten in the OAM function section. In addition, in the case of an AIS cell, the function type is rewritten so as to become an RDI cell. In the case of an LB cell, the LB indication is rewritten so as to become a return LB cell, and switching to its own port is conducted in the ATM switch core.

Switch with OAM functions

ATM switch with OAM functions

An ATM cell buffer system for buffering ATM cells in various network nodes forming an ATM network, comprising a congestion control unit for controlling congestion of the ATM cells, and further comprising a control counter for counting the number of ATM cells supplied from the ATM cell buffer, in every predetermined period, for every VC queue, within the congestion control unit , the congestion control unit deciding the count value of the counter as the minimum output bandwidth for deciding the number of ATM cells to be stored in the next predetermined period, for every connection.

ATM cell buffer system and its congestion control method

An ATM cell buffer read control system prevents over-rate due to excessive use of an extra line capacity with guarantee of a minimum output rate in a WRR system. The ATM cell buffer read control system effectively uses a band by distributing an extra band with a ratio of number of ATM cell number per connection with guarantee of minimum output band per connection according to preliminarily set ratio of output ATM cell number per a given period. The ATM cell buffer read control system makes judgment whether the output band after distribution of the extra band falls within a reference output range.

ATM cell buffer read control system and control method

A temperature-compensated piezoelectric oscillator includes a voltage-controlled piezoelectric oscillator, a first frequency divider, a second frequency divider, and a controller. The voltage-controlled piezoelectric oscillator has an output frequency controlled by a control voltage and oscillates the output frequency having a center frequency f.sub.0 at an ambient temperature of t.sub.0. The first frequency divider frequency-divides the output frequency from the voltage-controlled piezoelectric oscillator by N to output a first divided output frequency. The second frequency divider frequency-divides the output frequency from the voltage-controlled piezoelectric oscillator by M to output a second divided output frequency. The controller controls the control voltage to be applied to the voltage-controlled piezoelectric oscillator on the basis of a frequency difference between the first and second divided output frequencies upon a variation in ambient temperature of t.sub.0 to keep the output frequency of the voltage-controlled piezoelectric oscillator at the center frequency f.sub.0.

Growing community of inventors

Tokyo, Japan

Hiroyuki Iwamoto