NEC NEAX 2400 IMS PH-PC29 Emergency Alarm Controller Circuit Card (Refurbished)The PH PC29 (EMA) circuit card detects various kinds of alarms which may occur in the system and sends out the information of the detected alarm to the circuits concerned, activating the system MJ MN LEDs on the TOPU. Furthermore, the card has Music On Hold Sending function in law PCM. Additionally, this card can control the active stand by status of the CPU in the case of dual configuration. Key Features: Mnfr. Part #: PH PC29 201223 NEC NEAX 2400