For a single phone:
VRS SingleBOX ISDN - adapter for double-channel call recording  for ISDN BRI telephone line
VRS SingleBOX AT - adapter for single-channel call recording  for  analogue telephone line
VRS SingleBOX Up0 - adapter for single-channel call recording  for  digital  telephone line

For multichannel call  recording sistem for telephone lines:
VRS MultiBOX Basic - basic devices for multichannel voice  recording sistem  from digital and analog telephone lines
VRS MultiBOX Comfort - compact  devices for multichannel voice  recording sistem  from digital and analog telephone lines 
Adapter AD 8 - compact devices for multichannel voice recording sistem from analog telephone lines