AudioCodes Mediant 2000 User Manual page 5

SIP User's Manual
10.6 DNS ...................................................................................................................... 113
10.6.1 Configuring the Internal DNS Table .......................................................................113
10.6.2 Configuring the Internal SRV Table .......................................................................115
10.7 NAT (Network Address Translation) Support ....................................................... 116
10.7.1 STUN .....................................................................................................................116
10.7.2 First Incoming Packet Mechanism .........................................................................117
10.7.3 No-Op Packets ......................................................................................................117
10.8 Configuring NFS Settings ..................................................................................... 118
10.9 Robust Receipt of Media Streams ....................................................................... 120
10.10 Multiple Routers Support ...................................................................................... 120
10.11 IP Multicasting ...................................................................................................... 120
11 Security ............................................................................................................ 121
11.1 Configuring Firewall Settings ............................................................................... 121
11.2 Configuring General Security Settings ................................................................. 125
11.3 Configuring IP Security Proposal Table ............................................................... 126
11.4 Configuring IP Security Associations Table ......................................................... 127
12 Media ................................................................................................................ 131
12.1 Configuring Voice Settings ................................................................................... 131
12.1.1 Voice Gain (Volume) Control .................................................................................132
12.1.2 Silence Suppression (Compression) .....................................................................132
12.1.3 Echo Cancellation ..................................................................................................133
12.2 Fax and Modem Capabilities ................................................................................ 134
12.2.1 Fax/Modem Operating Modes ...............................................................................135
12.2.2 Fax/Modem Transport Modes ...............................................................................135
12.2.2.1 T.38 Fax Relay Mode ............................................................................ 135
12.2.2.2 G.711 Fax / Modem Transport Mode .................................................... 136
12.2.2.3 Fax Fallback .......................................................................................... 137
12.2.2.4 Fax/Modem Bypass Mode .................................................................... 137
12.2.2.5 Fax / Modem NSE Mode ....................................................................... 138
12.2.2.6 Fax / Modem Transparent with Events Mode ....................................... 139
12.2.2.7 Fax / Modem Transparent Mode ........................................................... 139
12.2.2.8 RFC 2833 ANS Report upon Fax/Modem Detection ............................ 140
12.2.3 V.34 Fax Support ...................................................................................................140
12.2.3.1 Bypass Mechanism for V.34 Fax Transmission .................................... 140
12.2.3.2 Relay Mode for T.30 and V.34 Faxes ................................................... 141
12.2.4 V.152 Support ........................................................................................................141
12.2.5 Fax Transmission behind NAT ..............................................................................142
12.3 Configuring RTP/RTCP Settings .......................................................................... 143
12.3.1 Dynamic Jitter Buffer Operation ............................................................................144
12.3.2 Comfort Noise Generation .....................................................................................145
12.3.3 Dual-Tone Multi-Frequency Signaling ...................................................................145
12.3.3.1 Configuring DTMF Transport Types ...................................................... 145
12.3.3.2 Configuring RFC 2833 Payload ............................................................ 146
12.3.4 RTP Multiplexing (ThroughPacket) ........................................................................148
12.3.5 Configuring RTP Base UDP Port ...........................................................................150
12.3.6 Configuring RTP Control Protocol Extended Reports (RTCP XR) ........................150
12.4 Configuring IP Media Settings .............................................................................. 152
12.4.1 Answer Machine Detector (AMD) ..........................................................................153
12.4.2 Configuring Automatic Gain Control (AGC) ...........................................................157
12.5 Configuring General Media Settings .................................................................... 157
12.6 Configuring DSP Templates ................................................................................. 158
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Contents
November 2011