Cisco SPA303 Administration Guide

Cisco SPA IP Phone Field Reference
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Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 296
B
NAT Settings
Network Settings
Parameter Description
NAT Mapping Enable To use externally mapped IP addresses and SIP/RTP
ports in SIP messages, select yes. Otherwise, select
no.
Defaults to no.
NAT Keep Alive Enable To send the configured NAT keep alive message
periodically, select yes. Otherwise, select no.
Defaults to no.
NAT Keep Alive Msg Enter the keep alive message that should be sent
periodically to maintain the current NAT mapping. If the
value is $NOTIFY, a NOTIFY message is sent. If the
value is $REGISTER, a REGISTER message without
contact is sent.
Defaults to $NOTIFY.
NAT Keep Alive Dest Destination that should receive NAT keep alive
messages. If the value is $PROXY, the messages are
sent to the current or outbound proxy.
Defaults to $PROXY.
Parameter Description
SIP TOS/DiffServ Value TOS/DiffServ field value in UDP IP packets carrying a
SIP message.
Defaults to 0x68.
SIP CoS Value CoS value for SIP messages.
Defaults to 3.

Cisco SPA303 Specifications

General

Display	Monochrome LCD
Lines	3
Speakerphone	Yes
Headset Jack	Yes (2.5 mm)
Handset	Yes
Ethernet Ports	2 x 10/100 Mbps
Protocol	SIP
Power	Power over Ethernet (PoE) or AC adapter
Audio Codec Support	G.711, G.729
QoS	802.1p/q