Table of Contents
Advertisement
Overview of Cisco Cius
Networking protocol
Link Layer Discovery
Protocol (LLDP)
Link Layer Discovery
Protocol-Media Endpoint
Devices (LLDP-MED)
Real-Time Transport
Protocol (RTP)
Real-Time Control
Protocol (RTCP)
Session Description
Protocol (SDP)
OL-26938-01
Purpose
LLDP is a standardized network
discovery protocol (similar to CDP)
that is supported on some Cisco and
third-party devices.
LLDP-MED is an extension of the
LLDP standard developed for voice
products.
RTP is a standard protocol for
transporting real-time data, such as
interactive voice and video, over data
networks.
RTCP works in conjunction with RTP
to provide QoS data (such as jitter,
latency, and round-trip delay) on RTP
streams. RTCP is also used to
synchronize the audio and video stream
in order to provide a better video
experience.
SDP is the portion of the SIP protocol
that determines which parameters are
available during a connection between
two endpoints. Conferences are
established by using only the SDP
capabilities that are supported by all
endpoints in the conference.
Supported Networking Protocols
Usage notes
-
Cisco Cius supports LLDP-MED on the
media station switch 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 at this
URL:
http://www.cisco.com/en/US/
technologies/tk652/tk701/technologies_
white_paper0900aecd804cd46d.html
Cisco Cius uses RTP to send and receive
real-time voice and video traffic from
other devices and gateways.
RTCP is disabled by default, but you can
use Cisco Unified Communications
Manager to enable it on a per-device
basis.
SDP capabilities, such as codec types,
DTMF detection, and comfort noise, are
normally configured on a global basis
by Cisco Unified Communications
Manager or Media Gateway in operation.
Some SIP endpoints may allow these
parameters to be configured on the
endpoint itself.
Cisco Cius Administration Guide, Release 9.2(3)
9
Advertisement
Table of Contents
