KT-3503N2D
- 431A Plug to 2 x British Jack with IDC Terminal
- Color : White
- Type : 6P4C

KT-3503NC-M
- Master ISDN Converter
- RJ45 to 2 x British Jack
- Color : White
- Type : BT Jack 6P6C

KT-3503NC-P
- PABX ISDN Converter
- RJ45 to 2 x British Jack
- Color : White
- Type : BT Jack 6P6C

KT-3503NC-S
- Secondary ISDN Converter
- RJ45 to 2 x British Jack
- Color : White
- Type : BT Jack 6P6C

KT-3503N1
- 431A Plug to 2 x British Jack
- Color : White
- Type : 6P4C, 6P6C