Configuring call transfer ························································································································· 211

Configuring hunt group ··························································································································· 212

Configuring three-party conference ········································································································ 215

Configuring silent monitor and barge in ································································································· 217

Advanced settings ······················································································· 223

Introduction to advanced settings ·················································································································· 223

Coding parameters ································································································································· 223

Other parameters ··································································································································· 227

Configuring advanced settings of a local number ·························································································· 227

Configuring coding parameters of a local number ················································································· 227

Configuring other parameters of a local number ···················································································· 229

Configuring advanced settings of a call route ································································································ 230

Configuring coding parameters of a call route ······················································································· 230

Configuring other parameters for a call route ························································································· 230

Advanced settings configuration example ····································································································· 231

Configuring out-of-band DTMF transmission mode for SIP ··································································· 231

SIP-to-SIP connections ··············································································· 233

Configuring media parameters for SIP-to-SIP connections ··········································································· 233

Configuring signaling parameters for SIP-to-SIP connections ······································································· 234

Configuring dial plans ················································································· 236

Dial plan process ··········································································································································· 236

Regular expression ········································································································································ 237

Dial plan functions ·········································································································································· 238

Number match ········································································································································ 238

Call control ············································································································································· 240

Number substitution ······························································································································· 240

Configuring dial plan ······································································································································ 241

Configuring number match ····················································································································· 241

Configuring call control ··························································································································· 242

Configuring number substitution ············································································································ 245

Dial plan configuration examples ··················································································································· 247

Configuring number match mode ··········································································································· 247

Configuring the match order of number selection rules ········································································· 250

Configuring entity type selection priority rules ························································································ 253

Configuring call authority control ············································································································ 257

Configuring number substitution ············································································································ 260

Call connection ··························································································· 268

Introduction to SIP ········································································································································· 268

Terminology ··········································································································································· 268

Functions and features of SIP ················································································································ 269

SIP messages ········································································································································ 270

SIP fundamentals ··································································································································· 270

Support for transport layer protocols ·············································································································· 273

SIP security ···················································································································································· 273

Signaling encryption ······························································································································· 274

Media flow encryption ···························································································································· 274

TLS-SRTP combinations ························································································································ 275

Support for SIP extensions ···························································································································· 275

Configuring SIP connections ······································································· 276

Configuring connection properties ················································································································· 276

Configuring registrar ······························································································································· 276

Configuring proxy server ························································································································ 277

Configuring session properties ······················································································································ 278

Configuring source address binding ······································································································· 278

Configuring SIP listening ························································································································ 280

Configuring media security ····················································································································· 281