AudioCodes Mediant 3000 User Manual page 5

SIP User's Manual
10.4.1.1 Destination Column ............................................................................... 132
10.4.1.2 Prefix Length Column ............................................................................ 132
10.4.1.3 Gateway Column ................................................................................... 132
10.4.1.4 Interface Column ................................................................................... 132
10.4.1.5 Metric Column ....................................................................................... 133
10.4.1.6 State Column ......................................................................................... 133
10.4.2 Routing Table Configuration Summary and Guidelines ........................................133
10.4.3 Troubleshooting the Routing Table .......................................................................134
10.5 Configuring QoS Settings ..................................................................................... 134
10.6 DNS ...................................................................................................................... 135
10.6.1 Configuring the Internal DNS Table .......................................................................135
10.6.2 Configuring the Internal SRV Table .......................................................................136
10.7 NAT (Network Address Translation) Support ....................................................... 137
10.7.1 STUN .....................................................................................................................138
10.7.2 First Incoming Packet Mechanism .........................................................................139
10.7.3 No-Op Packets ......................................................................................................139
10.8 Configuring NFS Settings ..................................................................................... 140
10.9 Robust Receipt of Media Streams ....................................................................... 142
10.10 Multiple Routers Support ...................................................................................... 142
10.11 IP Multicasting ...................................................................................................... 142
11 Security ............................................................................................................ 143
11.1 Configuring Firewall Settings ............................................................................... 143
11.2 Configuring General Security Settings ................................................................. 147
11.3 Configuring IP Security Proposal Table ............................................................... 147
11.4 Configuring IP Security Associations Table ......................................................... 149
12 Media ................................................................................................................ 153
12.1 Configuring Voice Settings ................................................................................... 153
12.1.1 Voice Gain (Volume) Control .................................................................................153
12.1.2 Silence Suppression (Compression) .....................................................................154
12.1.3 Echo Cancellation ..................................................................................................154
12.2 Fax and Modem Capabilities ................................................................................ 156
12.2.1 Fax/Modem Operating Modes ...............................................................................157
12.2.2 Fax/Modem Transport Modes ...............................................................................157
12.2.2.1 T.38 Fax Relay Mode ............................................................................ 158
12.2.2.2 G.711 Fax / Modem Transport Mode .................................................... 159
12.2.2.3 Fax Fallback .......................................................................................... 159
12.2.2.4 Fax/Modem Bypass Mode .................................................................... 159
12.2.2.5 Fax / Modem NSE Mode ....................................................................... 160
12.2.2.6 Fax / Modem Transparent with Events Mode ....................................... 161
12.2.2.7 Fax / Modem Transparent Mode ........................................................... 161
12.2.2.8 RFC 2833 ANS Report upon Fax/Modem Detection ............................ 162
12.2.3 V.34 Fax Support ...................................................................................................162
12.2.3.1 Bypass Mechanism for V.34 Fax Transmission .................................... 163
12.2.3.2 Relay Mode for T.30 and V.34 Faxes ................................................... 163
12.2.3.3 V.34 Fax Relay for SG3 Fax Machines ................................................. 164
12.2.4 V.150.1 Modem Relay ...........................................................................................166
12.2.5 V.152 Support ........................................................................................................167
12.2.6 Fax Transmission behind NAT ..............................................................................167
12.3 Configuring RTP/RTCP Settings .......................................................................... 168
12.3.1 Dynamic Jitter Buffer Operation ............................................................................169
12.3.2 Comfort Noise Generation .....................................................................................170
12.3.3 Dual-Tone Multi-Frequency Signaling ...................................................................170
Version 6.4 5
Contents
November 2011