Cisco 7906G Administration Guide - Page 25

Cisco Unified IP Phones use the RTP, The Cisco Unified IP Phone supports

Page 25 highlights

Chapter 1 An Overview of the Cisco Unified IP Phone What Networking Protocols Are Used? Table 1-1 Supported Networking Protocols on the Cisco Unified IP Phone (continued) Networking Protocol Link Layer Discovery Protocol-Media Endpoint Devices (LLDP-MED) Real-Time Transport Protocol (RTP) Real-Time Control Protocol (RTCP Secure Real-Time Transport Protocol (SRTP) Purpose Usage Notes LLDP-MED is an extension of the The Cisco Unified IP Phone supports LLDP standard developed for voice LLDP-MED on the SW port to products. communicate information such as: • Voice VLAN configuration • Device discovery • Power management • Inventory management For more information about LLDP-MED support, see the LLDP-MED and Cisco Discovery Protocol white paper: http://www.cisco.com/en/US/tech/tk 652/tk701/technologies_white_pape r0900aecd804cd46d.shtml RTP is a standard protocol for transporting real-time data, such as interactive voice and video, over data networks. Cisco Unified IP Phones use the RTP protocol to send and receive real-time voice traffic from other phones and gateways. RTCP works with RTP to provide QoS data (such as jitter, latency, and round trip delay) on RTP streams. RTCP is disabled by default, but you can enable it on a per phone basis by using Cisco Unified Communications Manager. For more information, see the "Network Configuration" section on page 4-33. SRTP is available in addition to RTP. SRTP adds security by encrypting media streams during data transport. For SRTP to work, the phone or phones being called must also support SRTP or else those phones cannot decrypt the secure media stream. OL-14585-01 Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.1 1-7

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278

1-7
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.1
OL-14585-01
Chapter 1
An Overview of the Cisco Unified IP Phone
What Networking Protocols Are Used?
Link Layer Discovery
Protocol-Media
Endpoint Devices
(LLDP-MED)
LLDP-MED is an extension of the
LLDP standard developed for voice
products.
The Cisco Unified IP Phone supports
LLDP-MED on the SW port to
communicate information such as:
Voice VLAN configuration
Device discovery
Power management
Inventory management
For more information about
LLDP-MED support, see the
LLDP-MED and Cisco Discovery
Protocol
white paper:
652/tk701/technologies_white_pape
r0900aecd804cd46d.shtml
Real-Time Transport
Protocol (RTP)
RTP is a standard protocol for
transporting real-time data, such as
interactive voice and video, over data
networks.
Cisco Unified IP Phones use the RTP
protocol to send and receive
real-time voice traffic from other
phones and gateways.
Real-Time Control
Protocol (RTCP
RTCP works with RTP to provide
QoS data (such as jitter, latency, and
round trip delay) on RTP streams.
RTCP is disabled by default, but you
can enable it on a per phone basis by
using Cisco Unified
Communications Manager. For more
information, see the
“Network
Configuration” section on page 4-33
.
Secure Real-Time
Transport Protocol
(SRTP)
SRTP is available in addition to RTP.
SRTP adds security by encrypting
media streams during data transport.
For SRTP to work, the phone or
phones being called must also
support SRTP or else those phones
cannot decrypt the secure media
stream.
Table 1-1
Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol
Purpose
Usage Notes