• Table of contents
• BT VS1
  • Hardware
    • Mainboard
    • Power Supply
    • Display
    • Camera
  • Software
    • RS232 port

BT VS1¶

This is a British Telecom ISDN video phone used in the UK.

It looks like it may have been originally manufactured by Tandberg, and could be a rebranded version of the Vision 600/770 series described at https://digitaltmuseum.no/021026869265/apparat. The screen of @laforge's unit states "Vision 610".

The circuit board is labeled P00400 in several places, and the flash contains a P00400C HARDWARE TEST PROGRAM seeming to confirm that P00400 was the codename / part number internally at Tandberg.

Hardware¶

Mainboard¶

Manufacturer	Part Nr	Description	Data Sheet
Motorola	M68360	M68k based microcontroller
Samsung	M416C1200CJ-6	RAM (2x for M68k)
8x8	8x83105AKAB	Video Codec ASIC
Samsung	M416C1200CJ-6	RAM (2x for 8x8?)
Analog Devices	ADSP-2181	Digital Signal Processor (audio?)
IDT	71024	? 4x next to 8x8
Intel	E28F016SA	NOR flash (2x for M68k?)
Xilinx	XC95108	glue logic?
Siemens	PEB2086N ISAC-S V1.1	ISDN controller
Brooktree	Bt864KPF
?	HMP8115CN
Crystal	CS42150-KL	Audio ADC/DAC
AMD	AM29F010	PLCC NOR Flash (M68k boot rom?); Label: S0 1549E	bt_vs1_tandberg_vs610_AM29F010.bin
IC Designs	IDC2051SC	Programmable Clock Generator
Linear	LT1039CSW	RS-232 driver (2x for DB-9)
Linear	LTC489CSW	RS-485 (2x)
Linear	LTC487CSW	RS-485

Power Supply¶

TBD

Display¶

TBD

Camera¶

TBD

Software¶

RS232 port¶

The port outputs the following at 9600bps during boot:

RAM test...passed
Flashsize: 4 Mbyte

Break ?....
Start....
����������������������������������������������������������������������������������������@�

which looks like some boot loader waiting for some magic input before booting the main firmware which then switches to some binary protocol.