Denwa Communications DW-820 User Manual page 112

Sections
SIP Account
SIP Server 1
SIP Server 2
Outbound Proxy Server
Transport Type
NAT
Description
To display and configure the specific Account settings.

Status: To display register result.

Display Label: Which is displayed on the phone's LCD
screen.

Display Name: Which is sent to the other call party for
displaying.

Register Name: Allocated by SIP server provider, used for
authentication.

User Name: Allocated by your SIP server provide, used
for authentication.

Password: Used for authorization.
To display and configure Primary SIP server settings.

Server IP: SIP server address, it could be an URL or IP
address.

Registration Period: The registration will expire after
Registration period, the IP phone will re-register
automatically within registration period.
To display and configure Secondary SIP server settings.
This is for redundancy, if registering to Primary SIP server
fails, the IP phone will go to Secondary SIP server for
registering.
Note: Secondary SIP server is used for redundancy, it can be
left blank if there is not redundancy SIP server in user's
environment.
To display and configure Outbound Proxy server settings.
An outbound proxy server is used to receive all initiating
request messages and route them to the designated SIP
server.
Note: If configured, all SIP request messages from the IP
phone will be sent to the outbound proxy server forcefully.
To display and configure Transport type for SIP message

UDP: UDP is an unreliable but very efficient transport
layer protocol.

TCP: Reliable but less-efficient transport layer protocol.
To display and configure NAT(Net Address Translator)
settings.

STUN: Short for Simple Traversal of UDP over NATS, a
solution to solve NAT issues.
Note: By default, NAT is disabled.