Abstract: Methods and system for validating facsimile communications by ensuring that each detected facsimile calling tone is actually a facsimile calling tone that was generated by a sending facsimile device. The method can include establishing a connection between a sending facsimile device and a receiving facsimile device, which was initiated by either the sending facsimile device or the receiving facsimile device. The connection can be utilized for at least one of facsimile communication, voice communication, and a combination of facsimile communication and voice communication. The method can also comprise switching the receiving facsimile machine from a voice-capable mode to a facsimile mode once at least one facsimile calling tone is detected after a first facsimile calling tone is detected while the receiving facsimile device in the line monitoring mode.

Abstract: A method of communicating with a shared imaging apparatus connected to a computer network, wherein communication over the network is facilitated through use of network packets, includes the steps of providing the shared imaging apparatus with networking hardware; providing the shared imaging apparatus with imaging apparatus firmware; defining a data channel associated with the networking hardware; instructing the networking hardware to accept information on the data channel from a user that owns the data channel; processing automatic Internet Protocol (IP) address negotiation network packets with the imaging apparatus firmware when the data channel is not owned; and processing second types of network packets, different from the automatic IP address negotiation network packets, by the networking hardware of the shared imaging apparatus when the data channel is owned.

Abstract: A method for operating a device (such as a printer) having a first interface (such as USB interface) connectable to a first computer and a second interface (such as an Ethernet interface) connectable to a second computer. A phase lock loop (PLL) circuit is obtained which is driven by a clock source, which is adapted for switching between operating at the first and second clock frequencies, and which is operatively connected to the first and second interfaces to provide a clock signal to the first and second interfaces. The PLL circuit is operated at the first clock frequency when the first interface is active and is operated at the second clock frequency when the second interface is active. A device includes the first and second interfaces, the PLL circuit, and the clock source.

Abstract: A method for operating a device (such as a printer) having a first interface (such as USB interface) connectable to a first computer and a second interface (such as an Ethernet interface) connectable to a second computer. A phase lock loop (PLL) circuit is obtained which is driven by a clock source, which is adapted for switching between operating at the first and second clock frequencies, and which is operatively connected to the first and second interfaces to provide a clock signal to the first and second interfaces. The PLL circuit is operated at the first clock frequency when the first interface is active and is operated at the second clock frequency when the second interface is active. A device includes the first and second interfaces, the PLL circuit, and the clock source.

Abstract: A method for negotiating an Internet Protocol (IP) address for an imaging apparatus connected to a network includes the steps of controlling network communication between the imaging apparatus and the network; defining an imaging state when the imaging apparatus is available for imaging, wherein during the imaging state the imaging apparatus waits in an idle state during periods of non-imaging; defining an automatic IP address negotiation state when the imaging apparatus is not available for imaging; if the imaging apparatus is in the idle state, then determining whether the imaging apparatus should leave the imaging state and enter the automatic IP address negotiation state; and when the imaging apparatus is in the automatic IP address negotiation state, then attempting to automatically assign an IP address to the imaging apparatus.

Abstract: A host computer connected to a network serves as a proxy IP address negotiator for another device connected to the network. The host computer constructs and sends a first network packet for communicating with an IP address server connected to the network. The IP address server responds to the host computer with a second network packet including a first IP address. The host computer retrieves the first IP address from the second network packet, and sends the first IP address to the device for adoption by the device as the device IP address.

Abstract: A method for negotiating an Internet Protocol (IP) address for an imaging apparatus connected to a network includes the steps of controlling network communication between the imaging apparatus and the network; defining an imaging state when the imaging apparatus is available for imaging, wherein during the imaging state the imaging apparatus waits in an idle state during periods of non-imaging; defining an automatic IP address negotiation state when the imaging apparatus is not available for imaging; if the imaging apparatus is in the idle state, then determining whether the imaging apparatus should leave the imaging state and enter the automatic IP address negotiation state; and when the imaging apparatus is in the automatic IP address negotiation state, then attempting to automatically assign an IP address to the imaging apparatus.

Abstract: A method for negotiating an Internet Protocol (IP) address for an imaging apparatus connected to a network includes the steps of controlling network communication between the imaging apparatus and the network; defining an imaging state when the imaging apparatus is available for imaging, wherein during the imaging state the imaging apparatus waits in an idle state during periods of non-imaging; defining an automatic IP address negotiation state when the imaging apparatus is not available for imaging; if the imaging apparatus is in the idle state, then determining whether the imaging apparatus should leave the imaging state and enter the automatic IP address negotiation state; and when the imaging apparatus is in the automatic IP address negotiation state, then attempting to automatically assign an IP address to the imaging apparatus.

Abstract: Disclosed is a split computer system that includes a first housing coupled to a second housing with a multi-conductor cable. The first housing includes a first direct access storage device (DASD) having an opening for receiving a removable storage medium. The second housing is separate from the first housing and includes a central processing unit (CPU) coupled to a local bus and an expansion bus, a non-volatile storage device coupled to the local bus, a second DASD coupled to the local bus and a power supply. The system further includes first and second DASD controllers coupled to the first and second DASDs respectively. The cable has one end coupled to the first housing and another end coupled to the second housing for electrically connecting devices in the first housing to devices in the second housing. The second housing has a first interface coupled to the expansion bus and the cable. The first housing also includes a second interface coupled to the cable and the first DASD.

Abstract: A computer system having four states of power management: a normal operating state, a standby state, a suspend state, and an off state. A control unit controls transitions between the various states. The standby state is characterized by devices, such as a video controller and a hard drive, being placed into a low-power mode transparent to the operating system and the applications executing on the computer system. The suspend state is characterized by executing code being interrupted and the state of the computer system being saved to a file on the hard drive in such a manner that system power may be removed after the state of the computer system is saved to the hard drive. Later, after system power is restored, the state of the computer system is resumed by reading from the hard drive and loading it in such a manner that the operating system and application programs are not adversely affected.