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-
- VTALK is a product from OKI Electric Industry, Japan,
- that allows voice talk between two Sun Sparcstation's
- over Ethernet. Each machine must have microphones connected
- to the audio port.
-
- This is a modified version that works for SunOS 4.1.
-
- Vtalk - How to
- --------------
-
- How to install:
-
- Copy the file 'vtalk.shar' to the directory where you want to
- install it.
- Unpack the archive by running through /bin/sh (command: sh vtalk.shar).
- This will produce .c and .h files, and a Makefile.
- Type 'make'. This will produce the executables
- 'vtalk' and 'vtalkd'.
-
- If not done earlier, a service must be allocated to vtalkd in the NIS database
- and /etc/services.
- A service number like 2999 will be suitable. The entry should
- look like:
-
- vtalk 2999/tcp
-
- This can only be done by the superuser (root), so you should contact
- your system administrator to have this done on your system.
-
- How to run:
-
- Start vtalkd ('vtalkd &') on every machine that you want voice talk to work on.
- This could be done at startup in the .login file.
- To initiate a connection, type 'vtalk user@machine'. The user on that machine
- will be informed of the request. A user accepts a connection by typing 'vtalk'.
-
- Here is some info on how to wire the microphone plug (Swedish version) :
-
- ***********************************************************************
- I/O Connector:
-
- This is the view looking at the connector end of an adapter cable.
-
- 6x 7x 8x
- 3x 4x 5x
- 1x 2x
-
- The connections to these pins are as follows:
-
- Pin 1 no connect
- Pin 2 no connect
- Pin 3 Michrophone (tip)
- Pin 4 no connect
- Pin 5 no connect
- Pin 6 Michrophone (sleeve or shield)
- Pin 7 audio out (tip)
- Pin 8 audio out (sleeve or shield)
-
- Pin 7 and 8 is only connected if you want to use an external loudspeaker.
- A cheap freestyle booster speaker works fine.
- My speaker is called 'GALAX PS-388R', made in China and costs 160 Skr,
- (appr US$ 28) here in Sweden. I have connected a 12V AC/DC adaptor to it
- so batteries are no problem..
- NOTE: If you want the external speaker to work with 'vtalk' you might
- need to include some code that switches output to the audio jack,
- or use the Sun tool 'gaintool' to manually specify speaker output.
-
- Mini-DIN plugs for the SPARC audio connector can be ordered in Sweden
- from ELFA, phone 08-7353535,
- Article no. 42-193-58
-
- A suitable screened michrophone cable between this plug and a phono jack is
- no. 55-801-05, appr 2 metres, or solder the michrophone's own cable
- directly to the Mini-DIN plug.
-
- If both external speaker and mike is desired, use a stereo audio cable,
- no. 55-807-82, and connect this to some adapter box that
- in turn allows connecting both a michrophone and booster speaker.
- The choice is yours.
- ********************************************************************************
-
- Happy talking,
-
- gunnar@falcon10.ericsson.se
-
-