1-9
Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
OL-4277-01
Chapter 1
Overview of the Cisco IP Phone Models 7905G and 7912G
SIP Overview
Figure 1-2
SIP Architecture
Related Topic
•
•
•
SIP Clients
SIP clients include the following:
•
Telephones—Act as either UAS or UAC. The Cisco IP Phone models 7905G
and 7912G can initiate SIP requests and respond to requests.
•
Gateways—Provide call control. Gateways provide many services, the most
common being translation between SIP conferencing endpoints of
transmission format, communications procedures, and codecs. Other
functions include call setup and clearing on both the LAN side and the
switched-circuit network side.
P user agents
RTP
SIP
SIP proxy and
redirect servers
SIP gateway
PSTN
Legacy PBX
SIP
SIP
72342
Содержание Unified 7905G
Страница 4: ......
Страница 23: ...xxiii Cisco IP Phone Models 7905G and 7912G Administrator Guide SIP OL 4277 01 Preface Document Conventions ...
Страница 24: ...Preface Document Conventions xxiv Cisco IP Phone Models 7905G and 7912G Administrator Guide SIP OL 4277 01 ...
Страница 222: ...Glossary GL 12 Cisco IP Phone Models 7905G and 7912G Administrator Guide SIP OL 4277 01 ...