ZyXEL Communications P-2602R-DxA Series - Manual (Page 15)

P-2602R/RL-DxA Series User’s Guide
Table of Contents 15
10.11.2 Voice Activity Detection/Silence Suppression .....................................133
10.11.3 Comfort Noise Generation ..................................................................133
10.11.4 Echo Cancellation ...............................................................................134
10.12 Analog Phone ...............................................................................................134
10.13 Advanced Analog Phone Setup Screen .......................................................135
10.13.1 Common Phone Settings Screen .......................................................136
10.14 Supplementary Phone Services Overview ...................................................137
10.14.1 The Flash Key .....................................................................................138
10.14.2 Europe Type Supplementary Phone Services ....................................138
10.14.2.1 European Call Hold ...................................................................138
10.14.2.2 European Call Waiting ..............................................................139
10.14.2.3 European Call Transfer .............................................................139
10.14.2.4 European Three-Way Conference ............................................139
10.14.3 USA Type Supplementary Services ....................................................139
10.14.3.1 USA Call Hold ...........................................................................140
10.14.3.2 USA Call Waiting ......................................................................140
10.14.3.3 USA Call Transfer .....................................................................140
10.14.3.4 USA Three-Way Conference .....................................................140
10.15 Phone Region Screen ..................................................................................141
10.16 Speed Dial ....................................................................................................141
10.16.1 Peer-to-Peer Calls ..............................................................................142
10.17 Speed Dial Screen .......................................................................................142
10.18 Incoming Call Policy Screen ........................................................................143
10.19 PSTN Line Screen .......................................................................................145
Chapter 11
Phone Usage ........................................................................................................ 147
11.1 Dialing a Telephone Number ..........................................................................147
11.2 Using Speed Dial to Dial a Telephone Number ..............................................147
11.3 Internal Calls ..................................................................................................147
11.4 Checking the Device’s IP Address .................................................................147
11.5 Auto Firmware Upgrade .................................................................................148
Chapter 12
Firewalls................................................................................................................ 149
12.1 Firewall Overview ..........................................................................................149
12.2 Types of Firewalls ..........................................................................................149
12.2.1 Packet Filtering Firewalls ......................................................................149
12.2.2 Application-level Firewalls ....................................................................150
12.2.3 Stateful Inspection Firewalls ................................................................150
12.3 Introduction to ZyXEL’s Firewall .....................................................................150
12.3.1 Denial of Service Attacks ......................................................................151
12.4 Denial of Service ............................................................................................151