Cisco 6851 Administration Guide

VLAN Settings 58
Cisco Discovery Protocol 58
LLDP-MED 58
Chassis ID TLV 60
Port ID TLV 60
Time to Live TLV 60
End of LLDPDU TLV 60
Port Description TLV 60
System Name TLV 60
System Capabilities TLV 61
Management Address TLV 61
System Description TLV 61
IEEE 802.3 MAC/PHY Configuration/Status TLV 61
LLDP-MED Capabilities TLV 62
Network Policy TLV 62
LLDP-MED Extended Power-Via-MDI TLV 63
LLDP-MED Inventory Management TLV 63
Final Network Policy Resolution and QoS 63
Special VLANs 63
Default QoS for SIP Mode 63
Default QoS for SPCP Mode 63
QoS Resolution for CDP 63
QoS Resolution for LLDP-MED 64
Coexistence with CDP 64
LLDP-MED and Multiple Network Devices 64
Configure VLAN Settings 64
Set Up DHCP VLAN Option from Phone Web Page 65
SIP and NAT Configuration 66
SIP and the Cisco IP Phone 66
SIP Over TCP 66
SIP Proxy Redundancy 66
Dual Registration 67
Failover and Recovery Registration 67
RFC3311 68
Cisco IP Phone 6800 Series Multiplatform Phones Administration Guide
v
Contents

Cisco 6851 Specifications

General

Network Protocols	SIP
Speakerphone	Yes
Bluetooth	No
Wi-Fi	No
USB Port	No
Display	3.5 inch grayscale display (396 x 162 pixels)
Ethernet	10/100 Ethernet
PoE	IEEE 802.3af
Audio	Wideband audio
Line Keys	4
Headset Port	RJ9
Supported Codecs	G.711, G.722, G.729, iLBC
Weight	0.9 kg