Panasonic Hybrid IP-PBX Manual page 18

2.2 VoIP Requirements Checklist
Network Devices
No.
Can the firewall pass packets from IP-PTs?
When a firewall is used, make sure to configure
3-a
the firewall appropriately to allow VoIP packets to
pass through the network without being blocked
by filtering.
Are layer 2 or 3 switches used?
Do not use repeater hubs as they can increase
the network load.
3-b
Also note that the port of the switching hub that
connects to the IP-EXT16 card should be set to
operate under "Auto Negotiation" mode.
3-c Are Category 5 (CAT5) or higher cables used?
18 Information about IP Proprietary Telephones
Question Answer Memo
Model of firewall:
Yes
No
Model of switch:
Yes
No
Yes
No
Ref.
p. 15
p. 16
p. 16