A method for removing static differential delays resulting from an independent transport of the client signals of a client signal bundle through an optical transport network, OTN, which comprises OTN mappers mapping received client signals to ODU signals transported to OTN demappers demapping received ODU signals to client signals, wherein a process slave, PS, at the OTN mapper end of said OTN network supplies continuously or in response to a received request information about timing relations between the client signals of said client signal bundle to a process master, PM, at the OTN demapper end of said OTN network used by the process master, PM, to remove the static differential delays between the client signals of the respective client signal bundle.

A method for removing static differential delays resulting from an independent transport of the client signals of a client signal bundle through an optical transport network, OTN, which comprises OTN mappers mapping received client signals to ODU signals transported to OTN demappers demapping received ODU signals to client signals, wherein a process slave, PS, at the OTN mapper end of said OTN network supplies continuously or in response to a received request information about timing relations between the client signals of said client signal bundle to a process master, PM, at the OTN demapper end of said OTN network used by the process master, PM, to remove the static differential delays between the client signals of the respective client signal bundle.

An apparatus comprises a laser emitter configured to transmit laser energy across an air gap to a separate device; a mobile industry processor interface (MIPI); driver circuitry electrically coupled to the laser emitter, wherein the driver circuitry is configured to receive an electrical signal according to an MIPI protocol and drive the laser emitter according to the electrical signal; a tone circuit configured to generate a tone signal of a specified tone frequency; and an MIPI mode detection circuit electrically coupled to the driver circuitry and the MIPI, wherein the MIPI mode detection circuit is configured to detect a change between a MIPI low power (LP) mode and a MIPI high speed (HS) mode at the MIPI interface, and add the tone signal to an electrical signal provided to the driver circuitry from the MIPI according to the detected change.

An apparatus comprises a laser emitter configured to transmit laser energy across an air gap to a separate device; a mobile industry processor interface (MIPI); driver circuitry electrically coupled to the laser emitter, wherein the driver circuitry is configured to receive an electrical signal according to an MIPI protocol and drive the laser emitter according to the electrical signal; a tone circuit configured to generate a tone signal of a specified tone frequency; and an MIPI mode detection circuit electrically coupled to the driver circuitry and the MIPI, wherein the MIPI mode detection circuit is configured to detect a change between a MIPI low power (LP) mode and a MIPI high speed (HS) mode at the MIPI interface, and add the tone signal to an electrical signal provided to the driver circuitry from the MIPI according to the detected change.

The invention comprises a master device and slave, the signalling information containing identifying information aiming at identifying the slave device transmitting said signalling information, an optical communications network being adapted to enable in-band communications, an out-of-band communication channel being intended to enable transmissions of said signalling information with respect to the in-band communications, collisions occurring in the out-of-band communication channel when plural slave devices access the out-of-band communication channel by using respective carrier wavelengths that match each other. The master device transmits information representative at least of a mask that said slave devices have to apply to respective full identifiers so as to obtain respective reduced identifying information to be used by said slave devices within further signalling information to be respectively transmitted by said slave devices, the reduced identifying information aiming at containing enough bits to enable distinguishing the slave device from each other.

The present invention provides a method, which including: determining, by a first node, an adjustment requirement for a line interface rate; and according to the adjustment requirement for the line interface rate, adjusting, by the first node, a transport bandwidth of an optical channel (OCh) link, adjusting the number of optical channel transport lanes (OTLs) in an optical channel transport unit (OTUCn) link, and adjusting the number of optical channel data lanes (ODLs) in an optical channel data unit (ODUCn) link, where the OTL is in one-to-one correspondence with the ODL. In embodiments of the present invention, according to an adjustment requirement for a line interface rate, a transport bandwidth of an OCh link is adjusted, the number of OTLs in an OTUCn link is adjusted, and the number of ODLs in an ODUCn link is adjusted, so that the line interface rate can be dynamically adjusted.