
7.1.4 Error Messages ............................................................................................................300
7.1.5 Restarting the KX-NS1000 ...........................................................................................302
7.1.6 Troubleshooting by Error Log .......................................................................................304
8 Networking Information .......................................................................307
8.1 Information about Using an IP Network ......................................................................308
8.1.1 Using a VoIP Network with the PBX .............................................................................308
8.1.2 DHCP (Dynamic Host Configuration Protocol) Server .................................................311
8.1.3 VLAN (Virtual LAN) ......................................................................................................312
8.1.4 Jitter Buffer ...................................................................................................................313
8.1.5 Voice Activity Detection (VAD) .....................................................................................313
8.1.6 Network Configuration ..................................................................................................314
8.1.7 Network Devices ..........................................................................................................318
8.1.8 QoS (Quality of Service) ...............................................................................................319
8.1.9 Network Time Protocol (NTP) ......................................................................................320
8.2 H.323 CO Lines ..............................................................................................................321
8.2.1 Avoid Multiple IP Networks ...........................................................................................321
8.2.2 Gatekeeper ...................................................................................................................322
8.2.3 Bandwidth Assessment ................................................................................................322
8.2.4 Virtual VoIP Gateway Card Specifications ...................................................................325
8.3 SIP CO Lines ..................................................................................................................326
8.3.1 IP Telephony Service ...................................................................................................326
8.3.2 SIP Requirements ........................................................................................................329
8.3.3 Router Requirements ...................................................................................................329
8.3.4 Bandwidth Requirements .............................................................................................329
8.3.5 Virtual SIP CO Line Card Specifications ......................................................................331
8.4 Types of PBX Networks ................................................................................................332
8.4.1 One-look Network .........................................................................................................332
8.4.2 One-look Networking Survivability ................................................................................336
8.4.3 Information about Slave Units ......................................................................................343
8.4.4 H.323 QSIG Network ....................................................................................................345
8.4.5 Working with Multiple PBX Networks ...........................................................................346
8.5 Port Security ..................................................................................................................347
8.6 Built-in Router ...............................................................................................................351
8.6.1 Built-in Router Overview ...............................................................................................351
8.6.2 WAN Connection ..........................................................................................................353
8.6.3 DHCP Relay Agent .......................................................................................................354
8.6.4 Dynamic DNS ...............................................................................................................355
8.6.5 DNS Client ....................................................................................................................356
8.6.6 Protocol Bridge—IPv6 Bridge .......................................................................................357
8.6.7 Protocol Bridge—PPPoE Bridge ..................................................................................357
8.6.8 MAC Address Clone .....................................................................................................358
8.6.9 Routing .........................................................................................................................359
8.6.10 Firewall .........................................................................................................................359
8.6.11 Firewall—Packet Filtering .............................................................................................360
8.6.12 Firewall—Stateful Packet Inspection ............................................................................361
8.6.13 Firewall—DoS Protection .............................................................................................361
8.6.14 Firewall—Other Security Settings ................................................................................362
8.6.15 Dynamic NAPT (IP masquerade) .................................................................................363
8.6.16 Static NAPT (Port Forwarding) .....................................................................................363
8.6.17 DMZ Host .....................................................................................................................364
8.6.18 VoIP Port Dynamic Setting ...........................................................................................364
8.6.19 IPsec Pass-through ......................................................................................................365
8.6.20 PPTP Pass-through ......................................................................................................366
8.6.21 L2TP Pass-through ......................................................................................................366
Document Version 2016-03 Installation Manual 19
Table of Contents