The SQ-Phoenix Multifunction Encryptor is a portable in-line encryptor for voice and fax communications, using the AES128 digital encryption algorithm and 128-bit keys. The SQ-Phoenix Multifunction Encryptor takes data from the operator's communications equipment, digitises it if necessary, and encrypts it for transmission across analogue communications networks using standard modem protocols. The SQ-Phoenix Multifunction Encryptor is designed to be used with standard desktop telephones and fax machines, and secure operation is accessed by simple one-touch activation.

The SQ-Phoenix Multifunction Encryptor is administered and managed by authenticated users, and can be operated by any individual with physical access to the unit. When security is not selected the equipment does not interfere with clear communications.