de, 97
Dead air, 194
Decline (SIP response), 68
Dedicated messaging networks, 147
Delays, 30
Denial-of-service (DoS) attacks, 141
prevention of, 146??“147
with session teardown, 140
De-registration, 116, 118, 147
Des (in media attribute line), 85
Desired status (in media attribute
line), 85
Device identity addressing, 89??“95
Devices:
address of, 13
location of, 17
registration of, 5, 11
Device-watchdog-answer (DWA),
175, 185, 186
Device-watchdog-request (DWR),
175, 185, 186
DHCP (Dynamic Host Configuration
Protocol), 92
DHCP server, 108
Dialog, session vs., 64, 132??“133
Dialog ID, 71, 132??“134
DIAMETER, 12, 163
accounting with, 173??“175
attribute-value-pairs, 185,
187??“197
and charging, 162
for subscriber/charging data, 22,
25, 39
DIAMETER_credit_control_not_
applicable (result code 4011), 194
DIAMETER_credit_limit_reached
(result code 4012), 194
DIAMETER_end_user_service_
denied (result code 4010), 194
DIAMETER_rating_failed (result
code 5031), 194
DIAMETER_user_unknown (result
code 5030), 194
Digital communications, 3
Digital rights management (DRM), 34
214 Index
Direction AVP, 188, 191
Disaster recovery, 169
Disconnection, from network, 116
Distributed routing, 163
DNS (see Domain Name Server;
Domain Name System)
DNS servers, 98
Does Not Exist Anymore
(SIP response), 68
Domain name:
I-CSCF identified using, 111
in REGISTER message, 110??“111
in SIP URI, 96??“98
Domain Name Server (DNS), 11,
97, 108
in IMS, 98??“99
queries to, 152
Domain Name System (DNS), 88, 98
Domain names:
addressing, 96??“99
and identification of home
network, 11
levels of, 98
DoS attacks (see Denial-of-service
attacks)
Downlink, 191
DRM (digital rights management), 34
DWA (see Device-watchdog-answer)
DWR (see Device-watchdog-request)
Dynamic addressing, 92
Dynamic Addressing Host, 92
Dynamic Host Configuration
Protocol (DHCP), 92
E
E interface, 22
E.
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