Grandstream Networks HT801 Administration Manual page 28

Primary SIP Server Configures SIP server IP address or domain name provided by VoIP service provider.
This is the primary SIP server used to send/receive SIP messages from/to HT801.
Failover SIP Server Specifies failover SIP server IP address or domain name provided by VoIP service
provider. This server will be used if the primary SIP server becomes unavailable.
Prefer Primary SIP Selects to prefer primary SIP server. The account will register to primary Server if
Server registration with Failover server expires. Default is No.
Outbound Proxy Specifies IP address or domain name of outbound Proxy, or media gateway, or session
border controller. Used by HT801 for firewall or NAT penetration in different network
environments. If symmetric NAT is detected, STUN will not work and only outbound
proxy can correct the problem.
Allow DHCP Option Configures the HT801 to collect SIP server address from DHCP option 120. Default is
120 (override SIP No
Server)
SIP transport Selects transport protocol for SIP packets; UDP or TCP or TLS. Please make sure your
SIP Server or network environment supports SIP over the selected transport method.
Default is UDP.
NAT Traversal
Indicates type of NAT for the account. This parameter configures whether the NAT
traversal mechanism is activated. Users could select the mechanism from No, Keep-
alive, STUN, UPnP. Default setting is No.
SIP User ID
Defines user account information provided by VoIP service provider (ITSP). Usually in
the form of digit similar to phone number or actually a phone number.
Determines account authenticate ID provided by VoIP service provider (ITSP). Can be
Authenticate ID
identical to or different from "SIP user ID".
Authenticate
Specifies account password provided by VoIP service provider (ITSP) to register to SIP
Password
servers.
Name
Chooses a name to be associated to user.
DNS Mode Selects DNS mode to use for the client to look up server. One mode can be chosen.
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A Record: resolves IP Address of target according to domain name.
SRV: DNS SRV resource records indicate how to find services for various
protocols.
NAPTR/SRV: Naming Authority Pointer according to RFC 2915.
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