Nortel Networks BCM 4.0 - Manual (Page 6)

6 About the Key Expansion Module (KEM)
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6 Attach the IP Phone stand and the IP Phone KEM stand, if removed. Adjust each IP Phone
KEM stand to the same angle as the IP Phone.
7 The IP Phone KEM powers up.
8 The IP Phone KEM uses the electrical connection of the IP Phone 2002 or IP Phone 2004 for
power. It does not have its own power source.