Grandstream Networks HT813 Administration Manual page 42

Specifies IP address or domain name of outbound Proxy, or media gateway, or session border controller.
Outbound
Used by HT813 for firewall or NAT penetration in different network environments. If symmetric NAT is
Proxy
detected, STUN will not work and only outbound proxy can correct the problem.
Backup
Configures the backup outbound proxy to be used when the "Outbound Proxy" registration fails. By
Outbound
default, this field is left empty.
Proxy
Prefer
Primary If the user configures this option to "Yes", when registration expires, the device will re-register via primary
Outbound outbound proxy. By default, this option is disabled.
Proxy
Selects transport protocol for SIP packets; UDP or TCP or TLS. Please make sure your SIP Server or network
SIP Transport
environment supports SIP over the selected transport method. Default is UDP.
Indicates type of NAT for each account. This parameter configures whether the NAT traversal mechanism
NAT Traversal
is activated. Users could select the mechanism from No, Keep-alive, STUN, UPnP. Default setting is No.
Defines user account information provided by VoIP service provider (ITSP). Usually in the form of digit
SIP User ID
similar to phone number or actually a phone number.
Authenticate Determines account authenticate ID provided by VoIP service provider (ITSP). Can be identical to or
ID different from "SIP user ID".
Authenticate
Specifies account password provided by VoIP service provider (ITSP) to register to SIP servers.
Password
Name Chooses a name to be associated to user.
Selects DNS mode to use for the client to look up server. One mode can be chosen.
A Record: resolves IP Address of target according to domain name.
DNS Mode SRV: DNS SRV resource records indicate how to find services for various protocols.
NAPTR/SRV: Naming Authority Pointer according to RFC 2915.
Default is A Record.
When this option is set to "Yes", when the HT is registered on second SRV and makes an outbound call, it
DNS SRV use
will try the second SRV (registered IP) first.
Registered IP
By default, this option is disabled and the DNS SRV will use first SRV instead of the registered IP.
Indicates E.164 number in "From" header by adding "User=Phone" parameter or using "Tel:" in SIP packets,
if the HT813 has an assigned PSTN Number.
Disabled: Use "SIP User ID" information in the Request-Line and "From" header.
Tel URI User=Phone: "User=Phone" parameter will be attached to the Request-Line and "From" header in the
SIP request to indicate the E.164 number. If set to "Enable".
Enabled: "Tel:" will be used instead of "sip:" in the SIP request.
Please consult your carrier before changing this parameter. Default is Disabled.
SIP
Controls whether the HT813 needs to send REGISTER messages to the proxy server. Default setting is Yes.
Registration