Browse Prior Art Database

VOIP Phone connection to a mobile computer dock Disclosure Number: IPCOM000029557D
Original Publication Date: 2004-Jul-06
Included in the Prior Art Database: 2004-Jul-06
Document File: 2 page(s) / 12K

Publishing Venue



This article describes a Mobile PC Desktop dock that has a passthrough for a desktop VOIP Phone that is connected to the LAN connection in the office or room.

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VOIP Phone connection to a mobile computer dock

In the future desktop and mobile products will have built-in VOIP capability. One way to do this is add a software application to run the phone. Customers may not like this idea since the operation of the phone would be dependent upon the operating system to be running. A new open standard for VOIP phones is emerging called SIP. This allows for low cost VOIP phones that plug directly into an RJ45 powered ethernet port. Most people only have one of these ports in their offices. Desktop PCs can add a second "pass-through" RJ45 port but this is impractical on a mobile pc because there is usually no room for it, but there is room on the mobile docking station. This product description solves the problem of how to use a voip phone with a mobile pc while it is docked by imitating the desktop pc .

Figure 1 is a view of a desktop PC with a second rj45 port added to it..

D esktop P C R ear V iew

R J 45 in

R J 45 out

Figure 1

Figure 2 is a schematic representation of the modified ethernet controller on the PC motherboard.

Ethernet Chip Mac/Phy

PCI Express

RJ 45 out

Figure 2

This figure shows that the ethernet IC has two ports. The IC has a built in switch to guarantee quality of service to the second port (out) that has the voip sip phone attached. The motherboard passes the powered ethernet power to the "out" port from the "in" port. (out from wall, in from phone). With this configuration a user can have one powered ethernet...