Re: Today I Received...
Posted: Sat Apr 20, 2019 8:54 am
Hi,
You could be mistaken, see the description on World Of Spectrum:
https://www.worldofspectrum.org/hardware/feat24.html
[quote="World Of Spectrum]
In producing an add-on to connect the Sinclair Spectrum to Micronet, Prism came up against a big challenge, as the machine is unsuitable for this application. It has no RS232 or serial interface, which means that ordinary modems cannot be connected. It has a screen display of 32 columns by 24 lines, and Prestel requires 40 by 24 display, as well as the complicated 'teletext' graphics system. The company produced an all-in-one unit designed specifically for this single task; the Prism VTX5000 modem.
The unit contains all the interfacing needed to connect the Spectrum, a direct-connect 1200/75 baud modem and software to access Prestel. This not only provides the standard functions for logging into the system, but also uses the Spectrum's graphics screen to imitate a true 40 by 24 teletext display. As a result, for £100, Spectrum owners can buy all the hardware necessary to join Micronet.
The VTX5000 sits underneath the Spectrum and connects to its expansion connector. The ribbon cable between the two has a third socket so that other spectrum peripherals, such as a printer or Microdrives, can be connected. This unit plugs directly into the phone system rather than using an acoustic coupler (in which the telephone handset is pushed into two rubber cups on the modem). This provides much more reliable communication.
[/quote]
I had one of these rubbish VTX 5000 units, it connected to the Spectrum expansion port.
You could be mistaken, see the description on World Of Spectrum:
https://www.worldofspectrum.org/hardware/feat24.html
[quote="World Of Spectrum]
In producing an add-on to connect the Sinclair Spectrum to Micronet, Prism came up against a big challenge, as the machine is unsuitable for this application. It has no RS232 or serial interface, which means that ordinary modems cannot be connected. It has a screen display of 32 columns by 24 lines, and Prestel requires 40 by 24 display, as well as the complicated 'teletext' graphics system. The company produced an all-in-one unit designed specifically for this single task; the Prism VTX5000 modem.
The unit contains all the interfacing needed to connect the Spectrum, a direct-connect 1200/75 baud modem and software to access Prestel. This not only provides the standard functions for logging into the system, but also uses the Spectrum's graphics screen to imitate a true 40 by 24 teletext display. As a result, for £100, Spectrum owners can buy all the hardware necessary to join Micronet.
The VTX5000 sits underneath the Spectrum and connects to its expansion connector. The ribbon cable between the two has a third socket so that other spectrum peripherals, such as a printer or Microdrives, can be connected. This unit plugs directly into the phone system rather than using an acoustic coupler (in which the telephone handset is pushed into two rubber cups on the modem). This provides much more reliable communication.
[/quote]
I had one of these rubbish VTX 5000 units, it connected to the Spectrum expansion port.