KT-3503N2D
KT-3503NC-M
Master ISDN Converter
RJ45 to 2 x British Jack
Color : White
Type : BT Jack 6P6C
KT-3503NC-P
PABX ISDN Converter
KT-3503NC-S
Secondary ISDN Converter
KT-3503N1
431A Plug to 2 x British Jack
Type : 6P4C, 6P6C