How to make the USB handset work with the serial interface?

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Steps to make the USB Handset make use of the interface that is serial. A USB handset is a phone that plugs straight into some type of computer. It can be used with softphone services like Skype, Sipnet, Xlite and Net2Phone.

Some newer laptops do not have Serial ports, and thus require a USB to Serial adapter. This may cause confusion when wanting to connect to PuTTY.

 

Connect the USB Handset towards the PC

 

The thing that is first'll need to do is connect the phone to a workstation via a USB-A to USB-C cable. It must appear shortly afterwards as a USB serial device to the workstation. The bus and device numbers can vary dependent on your workstation configuration.

 

The device shall display a notification stating that it is linked to a computer, because of the solution to select from USB storage (MTP), Media sync (PTP) or Camera connection (PTP). Select the mode of connection you would like and tap Connect.

 

Then you will need to use a USB-to-Serial converter that supports the PTP protocol if your newer laptop doesn't have a Serial port. You will then need to consider the COM port number this is certainly assigned to it, this will be distinct from COM1. If you use an Android phone with 4.2.2 or more then you may be prompted with a screen asking if you'd like to allow USB Debugging with this PC. You will need to authenticate with this method each time you connect the telephone to a PC that is new.

 

Connect the RJ12 towards the USB Handset

 

You can find a  number of supplies necessary to get this to connection. Most importantly, the wires that are bare to be connected properly. A modular crimper is essential, as is a set of small scissors to cut away any cable that is excess. A tester is also useful, as it could help to pinpoint any presssing difficulties with the connections.

 

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The cable connects to the RS232 port on the Losmandy Gemini 2 controller. This connection is used to communicate with the telescope's computer. The information is sent as binary messages, that are bytes representing values. This is certainly a bit more efficient than sending text, but could be tough to debug due to the fact data does not come out in a form that is human-readable.

 

Most newer laptops would not have serial ports, but there are cheap adapters available that will provide a serial interface. Once plugged in the device should appear as a retro usb handset that is serial the workstation. A simple command such as sudo usbnet should set up network routing from the workstation to the phone to test the connection.

 

Connect the RJ12 into the serial interface

 

In case the computer is of sufficient age it might have a port that is serial. Or even, you need to use a adapter that is USB-to-serial. However, most contemporary laptops no longer have serial ports.

 

RJ is abbreviated for the Registered Jack. It is used as a medium in telecommunications or network interface. It enables network devices to connect voice and data equipment.

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You need a USB-to-serial cable that has the correct pinout if you want to connect the RJ12 to a modern PC. I used a RJ12 that is 6p6c (6 wires inside with each being crimped into among the 6 positions on the plug). You’ll likewise require a data crimper and screwdriver (in case your adapter has screwdown terminals) to strip and terminate the  end regarding the cable.

 

The cable that is resulting then be connected towards the RJ12 jack from the mount. It must appear soon after as a waterproof usb handset a USB serial device on the workstation. Using puTTY you can log in to then the mount and begin working with it. The pc can send binary messages to the mount or it may use a text transform stream which converts binary into human-readable text.

 

Connect the USB Handset to your serial interface

 

A USB phone plugs into a pc's USB port and provides similar functionality to a traditional desktop telephone. It works with popular PC based software and services such as for instance Skype, MSN Messenger, Dialpad, Xten, Net2Phone and others.

 

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USB device communication will be based upon pipes (logical channels). Each pipe corresponds to a entity that is logical these devices, referred to as an endpoint. Endpoints are numbered during the connection that is initial, called enumeration.

 

Enumeration process

 

The enumeration process can take some time. Once complete the phone will show up as a device that is serial the workstation. You can then open the serial console using PuTTY. Depending on the workstation the unit can be assigned a different COM number than COM1.

 

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