The Merlin Magix 408 GS LS-ID MLX Module has the ability to connect any combination of up to four ground-start or loop-start lines. Also equipped on this module are right station ports for MLX telephones, BRI adjuncts, and Computer Telephony Integration (CTI) adjuncts. This unit has one power failure transfer port. The Merlin Magix Module works with Merlin Magix systems or Merlin Legend Release 2.0 or higher. You will be able to access Caller ID name with the requirement of Merlin Legend Release 7.0 or higher.