Abstract: System for the bidirectional connection of an ELAN and a CLS wide-area network (CLSnet) having an address memory for allocated MAC addresses of the ELAN (ELAN 1, . . . ) and E.164 addresses of the CLS network (CLSnet), having a memory for an E.164 address allocated to the transition to the CLS network (CLSnet), and having a controller in order, dependent on specific conditions, to handover frames coming from the ELAN to the interface to the CLS network in common with the E.164 address belonging to the destination MAC address or, respectively, to discard them, whereby frames having a local broadcast MAC address as destination address are always to be discarded, and in order to hand frames coming from the wide-area network over to the interface to the ELAN.

Abstract: A distinction is made between unicast frames and multicast/broadcast frames for the transmission of information packets between a source LEC of a first ELAN and a destination LEC of a second ELAN. After initiation of a connection setup, unicast information packets are transmitted between source LEC and destination LEC via a wide-area ATM network upon employment of the destination ATM address. Multicast/broadcast information packets are transmitted from the source LEC to the destination LECs via a CLS wide-area network offering a connectionless service. For the transmission of the multicast/broadcast information packets, a specific LEC in every ELAN of an exemplary embodiment is coupled to the CLS network via a bridge or a router. In one exemplary embodiment, the CLS network is employed for determining a destination ATM address of a destination LEC for the unicast transmission.

Abstract: Method for the transmission of information packets between a source LEC of a first ELAN and a destination LEC of a second ELAN, having the following method steps: determination of the destination ATM address by transmission of an address resolution request of the source LEC to the second ELAN via a CLS wideare network offering a connectionless service and resolution of the destination MAC address in the second ELAN into the appertaining ATM address; initiation of a connection setup between source LEC and destination LEC via an ATM network ranking higher than the first ELAN and the second ELAN upon employment of the identified destination ATM address; and transmission of the information packets via the higher-ranking ATM network. In one exemplary embodiment, the determined ATM address is transmitted to the first ELAN via the CLS wide-area network as address resolution response and is transmitted thereat to the source LEC, and the source LEC initiates a connection setup to the destination LEC.

Abstract: Method for the determination of a destination ATM address as reply to an address resolution inquiry output by a source LAN emulation client of a first ELAN when the destination MAC address to be resolved is allocated to at least one LAN emulation client of a second ELAN and the first as well as the second ELAN are connected to a higher-ranking network, having the following method steps: encapsulation of the address resolution request present in the first ELAN as ELAN frame in a frame format of the CLS wide-area network and transmission via the CLS wide-area network to the second ELAN; de-encapsulation of the encapsulated address resolution request and handover to an LAN emulation server LES of the second ELAN in the ELAN frame format; resolution of the destination MAC address into an appertaining ATM address by this LAN emulation server of the second ELAN and output of an address resolution response; encapsulation of this address resolution response into the frame format of the CLS wide-area network and trans

Abstract: An optical monitoring device includes a reflector, which is mounted on a surface of a rotating member adjacent the periphery to travel in a circular path, and a light source, which creates an input beam which either is directed at a given angle of incidence at a point on the circular path of the reflector or is directed through a waveguide at the point. The device also includes a second waveguide which is arranged on the path of light reflected by the reflector and conducts the reflected light to an opto-electrical transducer which converts the reflected light pulses into electrical pulses which are applied to a source of sound, such as a piezo ceramic plate with a resonator which creates an alarm when a certain frequency is reached.

Abstract: An optical device for monitoring the speed of a rotating member characterized by a reflector mounted on a surface of the rotating member adjacent the periphery to travel in a circular path, a light source creating an input beam and either directing it at along a given angle of incidence at a point on the circular path of the reflector or through a waveguide at the point, a second waveguide arranged on the path of light reflected by the reflector and conducting the reflected light to an opto-acoustical transducer which converts the reflected light pulses into sound.

Abstract: A method and device for monitoring and minimizing the splicing losses at a splicing location for glass fiber cables characterized by a measuring cylinder which has a hinge to enable opening the cylinder up to place it around a splicing connection and has a photosensitive layer for converting a light escaping at the splicing location into an electrical signal and a device for evaluating the electrical signal. The photoelectric sensing device can be a continuous layer or a series of photoelectric elements electrically interconnected and the device for evaluating the electrical signal produced by the photoelectric sensing device preferably includes ear phones which converts the electrical signal into an accoustical signal and the light being applied to the cable is applied with a frequency in the audible frequency range of an ear.

Abstract: An optical device for measuring both slight positive and negative pressure differences by means of a light intensity change characterized by a gradient lens having a first and second end face being mounted in a housing part with a second end face spaced from a partially reflective membrane which is secured to the housing part to form a first chamber of a first volume and a second chamber of a second volume.

Abstract: An optical device for measuring slight pressure differences by means of a light intensity change characterized by a membrane extending across a recess of a housing part to form a first chamber of a first volume which is isolated from a second chamber on the opposite side of the membrane, a right angle isosceles glass prism mounted in the recess with a hypotenuse surface facing said membrane and extending parallel thereto, an input optical waveguide coupled to one short side surface of the prism extending to the light source of a given light intensity for coupling light from said source into the prism and an output optical waveguide being coupled to the other short side surface of the prism for output coupling light from the prism to a measuring device.