Transcript UCI Lecture 1

Unified Communication
Infrastructure
UCI
Cisco Unified Communications Manager Signaling and
Media Paths
Cisco Unified Communications Manager Express
Signaling Protocol
Signaling Protocol
(SCCP / SIP)
IP Phone A
(SCCP / SIP)
Media Exchange — (RTP)
 Cisco Unified Communications Manager performs call setup
using a Signaling Protocol (SCCP/SIP).
 Media exchange occurs directly between endpoints using
RTP.
IP Phone B
Gateway Hardware Platforms (Cont.)
• Special voice gateways:
Cisco VG224 and VG248 Gateways
Cisco AS5850 Gateway
Cisco AS5300 and AS5400 Series Gateways
Cisco 827-4V Router
EOS: 05/2005
EOL: 05/2010
Cisco ATA 186
Cisco 7200 Series Routers
Gateway Hardware Platforms
• Modern enterprise models:
Cisco 2800 Series Routers
Cisco 3800 Series Routers
Cisco Catalyst 6500 Series
Cisco Catalyst Family of Switches
Cisco Catalyst 6500
Cisco Catalyst 4500
Cisco Catalyst 3750
Cisco EtherSwitch Network Module
Cisco Catalyst 3560
Three Ways to Power Cisco IP Phones
– Power over Ethernet (PoE):
– Needs PoE line cards or PoE ports
for Cisco Catalyst switches
– Delivers 48V DC over data pairs
(pins 1, 2, 3, and 6) or spare pairs (pins
4, 5, 7, 8)
– Midspan power injection:
– Needs external power source
equipment
– Delivers 48V DC over spare pairs
– Wall power:
– Needs DC converter to connect a
Cisco IP phone to a wall outlet
Power
Power Injector
No Power
AC
Source
Power
110 V AC Wall
Power to 48 V
DC Converter
Two Types of PoE Delivery
Cisco original implementation:
– Provides -48V DC at up to 6.3 to 7.7 W per port over data pins
1, 2, 3, and 6.
– Supports most Cisco devices (Cisco IP phones and wireless access points).
– Uses a Cisco proprietary method of determining if an attached device requires
power. Power is delivered only to devices that require power.
IEEE 802.3af Power over Ethernet:
– Specifies 48V DC at up to 15.4W per port over data pins 1, 2, 3, and 6 or spare
pins 4, 5, 7, and 8.
– Enables a new range of Ethernet-powered devices because of increased
power.
– Standardizes the method of determining if an attached device requires power.
Power is delivered only to devices that require power.
– Has several optional elements, including power classification.
Cisco Prestandard Device Detection
Cisco Prestandard
Implementation
Powered Device Port
Pin3
FLP
Switch
It is an inline device.
Pin6
Rx
FLP
Pin1
Pin2
Tx
IEEE 802.3af Device Detection
IEEE 802.3af Powered Device
IEEE 802.3af PSE
Switch
It is an IEEE
powered device.
2.8V to 10V
Pin3
Detect Voltage
Pin6
Rx
Pin1
Pin2
Tx
25K Ohm
Resistor
Redundancy Design
Primary
Secondary or
Backup
7500 IP phones
Cisco MCS 7845
Publisher and
TFTP Server (Not
Req. <1000)
Primary
1 to 7500
15,000 IP phones
Cisco MCS 7845
Publisher and
TFTP Server
Backups
1 to
7500
30,000 IP phones
Cisco MCS 7845
Publisher and
TFTP Server
Backups
7501 to
15,000
1 to
7500
7501 to
15,000
Backup
Backups
15001 to
22,500
22,501 to
30,000