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278 CHAPTER 5: SYSTEM CONFIGURATION
Network Protocol The transport mechanism for voice packets.
Ethernet only: All communications are at the Ethernet frame
layer.
Standard IP: IP communications are used for traffic between
NBX system addresses.
NOTE: Every device needs an IP address.
IP communications are optional features of the NBX system
and require separate licensing.
IP On-the-Fly: An implementation of IP communications in
which Layer 2 (Ethernet) devices are temporarily assigned a
Layer 3 (IP) address only when they need to communicate with
a Layer 3 device on a different subnetwork. The IP address is
assigned from an address pool defined by the NBX system
administrator. After the Layer 2 device returns to the idle state
the IP address is returned to the pool of available addresses for
future use.
If you have the appropriate license and select IP On-the-Fly in
the Network Protocol list, you must return to the Current
System Settings window, select IP Addresses and add the
IP addresses associated with IP-on-the-Fly. There may be
unpredictable results in other system functions if you have
Network Protocol set to IP-on-the-Fly but do not have any
IP telephones or addresses.
Extensions Start at The starting extension number used by Auto Discover
Telephones.
You may select any unused telephone number extension from
these ranges:
NBX 100:
3-digit dial plan — 100–449
4-digit dial plan — 1000–4949
SuperStack 3 NBX:
3-digit dial plan — 100–399
4-digit dial plan — 1000–3999
External Prefix The prefix required for an outside line.
Caller ID Wait
Timer
Amount of time to wait for receiving Caller ID information.
Auto Add Phones
to Call Pickup
Group 0
When selected, this adds telephones to the default Call Pickup
Group 0 (zero) when telephones are added to the system. Turn
this ON before Auto Discovering telephones if you want the
telephones to appear in Call Pickup Group 0.
Table 55 System Settings System-wide Dialog Box Fields (continued)
Field Purpose