The New IP Telephony Server UNIVERGE SV9500 (hereinafter called SV9500) can be installed into your system
without wasting the existing assets, including SV8500 PIR, IPX PIM, circuit cards, terminals and IP devices
used in UNIVERGE SV8500 (hereinafter called SV8500) system/UNIVERGE SV7000 (hereinafter called
SV7000) system/UNIVERGE NEAX2400 IPX (hereinafter called IPX) system. You can reuse them in SV9500
system as in the previous system. This migration provides lower cost and requires a shorter period for installing
the SV9500 system.
This is straight out of the NEC migration manual.