KX-TES824UA, KX-TEM824UA, KX-TE82461X, KX-TE82474X, KX-TE82480X, KX-TE82483X, KX-TE82491X, KX-TE82492X, KX-TE82493X, KX-A227X, KX-TES824UAPP, KX-TEM824UAPP - Panasonic PBX Service Manual (repair manual). Page 121

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23.2. LOCATION OF OPTIONAL CARDS
23.2.1. 4-Port Doorphone Card (KX-TE82461X)
Function
Supports the connection of 4 doorphones and 4 dooropeners.
1. Loosen the screws and open the top and bottom front covers.
2. Attach the 4-Port Doorphone Card to the main unit, connect the cord to the Doorphone Card Connector and secure the
screw.
Note
Use extra care to make sure you do not damage the part of the case marked with a circle.
3.Close the covers and secure the screws.
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