Cisco 8841 Administration Guide

DescriptionParameter
Enables or disables the phone receiving SIP messages
from non-proxy server. If you choose Yes, the phone
blocks any incoming non-proxy SIP messages except
IN-dialog message. If you choose No, the phone does
not block any incoming non-proxy SIP messages.
Set Block Nonproxy SIP to No for phones that use
TCP or TLS to transport SIP messages. Nonproxy
SIP messages transported over TCP or TLS are
blocked by default.
Default: No
Block Nonproxy SIP
Network Settings
DescriptionParameter
Allows you to select the internet protocol mode in
which the phone operates. Options are: IPv4 Only,
IPv6 Only, and Dual Mode. In dual mode, the phone
can have both IPv4 and IPv6 addresses.
Default: Dual Mode
IP Mode
IPv4 Settings
DescriptionParameter
Internet connection type that is configured for the
phone. Options are DHCP and Static IP.
Default: DHCP
Connection Type
Subnet mask of the phone.NetMask
IP address of the phone.Static IP
IP address of the gateway.Gateway
Primary Domain Name Server (DNS) assigned to the
phone.
Primary DNS
Secondary Domain Name Server (DNS) if assigned
to the phone.
Secondary DNS
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
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Cisco IP Phone Troubleshooting
Network Settings

Cisco 8841 Specifications

General

Resolution	800 x 480 pixels
Audio	Wideband audio
Bluetooth	No
Ethernet	10/100/1000 Mbps
PoE	IEEE 802.3af compliant
Connectivity	Ethernet
Buttons	4 programmable line keys
Speakerphone	Full-duplex speakerphone
Headset Jack	Yes, RJ9
Codecs	G.711, G.722, G.729a, iLBC
Power Options	PoE
Network Interfaces	Dual Gigabit Ethernet ports
Security	Secure boot, 802.1X authentication, secure credential storage
Dimensions	40 mm
Weight	2.5 lb (1.1 kg)