Appendix A: Meridian Modular Telephones Page 347 of 504Telephones and Consoles Description, Installation, and OperationWhen installing an MCA or MPDA to NTZK or NT2K phone sets with a datecode prior to January 1998, a Power Option board is required, along with anadditional power source. When installing an MCA in an NT9K phone set oran NT2K with date code of January 1998, install only the MCA (an additionalPower Option board and Jumper board are not required).The Power Supply Board connects to the telephone through a 14 pin bottomentry connector.The Power Supply Board comes factory installed with any configuration ofthe M2216ACD-2. The M2006 and M2008 require the Power Supply Boardwith the addition of any option. The M2616 requires the Power Supply Boardwith any option except the Display Module.Refer to Figure 55 on page 347 and Figure 56 on page 348 for power supplyboard requirements.Table 55NT2K model Power requirements, Meridian Modular Telephone setsTelephone type Loop powerAdditional power(Power Supply Board andTransformer)M2006 Basic configuration Any option(s)* (MPDA, ExternalAlerter Interface, MCA)M2008/M2008HF Basic and Display configurations MPDA, External Alerter InterfaceM2616 Basic, Display, and Handsfreeconfigurations and Key ExpansionModule(s)MCA, MPDA, External AlerterInterface, MCAM2216ACD Basic configurations (with Display)Key Expansion Module(s).MPDA, Key Expansion Module,External Alerter Interface, MCA*No display can be added to the M2006 set.