SICO is a special converter based on a compact interface board. It can be deployed (especially in international use) to connect arbitrary PBXs to previously incompatible network infrastructures.

The Signal Converter is put in-between the incompatible systems, provides the required primary-rate interfaces on both sides (E1, T1), and converts user data, e.g. voice (B-channels), and/or signaling data (D-channel protocols or CAS) as needed.

The following conversion modes are currently available and selectable on site:
• A-law to µ-law conversion for E1
  (automatically switched off in case of data transfer)
  with D-channel protocol according to ETSI specification (DSS1) on both sides
• A-law to µ-law conversion for E1
  (always)
  with CAS signaling on both sides
• A-law to µ-law conversion for T1
  (automatically switched off in case of data transfer)
  with D-channel protocol NI2 on both sides
• µ-law to A-law conversion for T1
  (automatically switched off in case of data transfer)
  with D-channel protocol CorNet-NQ on both sides

Additional conversion modes feasible on request.