AudioCodes Mediant 500 E-SBC, User Manual

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Version 6.8 5 Mediant 500 E-SBC
User's Manual Contents
12.4 Configuring IP Network Interfaces ...................................................................... 115
12.4.1 Assigning NTP Services to Application Types ......................................................119
12.4.2 Multiple Interface Table Configuration Summary and Guidelines .........................119
12.4.3 Networking Configuration Examples .....................................................................120
12.4.3.1 One VoIP Interface for All Applications ..................................................120
12.4.3.2 VoIP Interface per Application Type .......................................................121
12.4.3.3 VoIP Interfaces for Combined Application Types ..................................121
12.4.3.4 VoIP Interfaces with Multiple Default Gateways ....................................123
12.5 Configuring Static IP Routes ............................................................................... 123
12.5.1 Configuration Example of Static IP Routes ...........................................................125
12.5.2 Troubleshooting the Routing Table .......................................................................126
12.6 Configuring Quality of Service ............................................................................ 127
12.7 Configuring ICMP Messages .............................................................................. 129
12.8 DNS ................................................................................................................... 130
12.8.1 Configuring the Internal DNS Table .......................................................................130
12.8.2 Configuring the Internal SRV Table .......................................................................131
12.9 Network Address Translation Support ................................................................ 133
12.9.1 Device Located behind NAT ..................................................................................133
12.9.1.1 Configuring a Static NAT IP Address for All Interfaces ..........................134
12.9.1.2 Configuring NAT Translation per IP Interface ........................................135
12.9.2 Remote UA behind NAT ........................................................................................136
12.9.2.1 SIP Signaling Messages ........................................................................136
12.9.2.2 Media (RTP/RTCP/T.38) ........................................................................137
12.10 Robust Receipt of Media Streams by Media Latching ......................................... 139
12.11 Multiple Routers Support .................................................................................... 140
13 Security ............................................................................................................ 141
13.1 Configuring Firewall Settings .............................................................................. 141
13.2 Configuring General Security Settings ................................................................ 145
13.3 Intrusion Detection System ................................................................................. 146
13.3.1 Enabling IDS ..........................................................................................................147
13.3.2 Configuring IDS Policies ........................................................................................147
13.3.3 Assigning IDS Policies ...........................................................................................151
13.3.4 Viewing IDS Alarms ...............................................................................................152
14 Media ................................................................................................................ 155
14.1 Configuring Voice Settings ................................................................................. 155
14.1.1 Configuring Voice Gain (Volume) Control .............................................................155
14.1.2 Silence Suppression (Compression) .....................................................................155
14.1.3 Echo Cancellation ..................................................................................................156
14.2 Fax and Modem Capabilities .............................................................................. 157
14.2.1 Fax/Modem Operating Modes ...............................................................................159
14.2.2 Fax/Modem Transport Modes ...............................................................................159
14.2.2.1 T.38 Fax Relay Mode .............................................................................159
14.2.2.2 G.711 Fax / Modem Transport Mode .....................................................162
14.2.2.3 Fax Fallback ...........................................................................................162
14.2.2.4 Fax/Modem Bypass Mode......................................................................163
14.2.2.5 Fax / Modem NSE Mode ........................................................................164
14.2.2.6 Fax / Modem Transparent with Events Mode ........................................165
14.2.2.7 Fax / Modem Transparent Mode ............................................................165
14.2.2.8 RFC 2833 ANS Report upon Fax/Modem Detection .............................166
14.2.3 V.34 Fax Support ...................................................................................................166
14.2.3.1 Bypass Mechanism for V.34 Fax Transmission .....................................167
14.2.3.2 Relay Mode for T.30 and V.34 Faxes ....................................................167