Grandstream Networks HT801 Administration Manual page 31

Validate Incoming Validates incoming messages. Default is No.
Messages
Check SIP User ID Checks SIP User ID in the Request URI of incoming INVITE; if it doesn't match the
for Incoming HT801 SIP User ID, the call will be rejected. Direct IP calling will also be disabled.
INVITE Default is No.
Authenticate Challenges the incoming INVITE for authentication with SIP 401 Unauthorized
Incoming INVITE message. Default is No.
Authenticate Configures whether to validate the domain certificate when download the
server certificate firmware/config file. If it is set to "Yes", the phone will download the firmware/config file
domain only from the legitimate server. The default setting is "No".
Authenticate Configures whether to validate the server certificate when download the firmware/config
file. If it is set to "Yes", the phone will download the firmware/config file only from the
server certificate
chain legitimate server. The default setting is "No".
Trusted CA Uses the certificate for Authentication if "Check Domain Certificates" is set to "Yes"
Certificates under "Account" -> "SIP Settings".
Allow Incoming SIP Checks SIP address of the Request URI in the incoming SIP message; if it doesn't
Messages from SIP match the SIP server address of the account, the call will be rejected. Default is No.
Proxy Only
Use Privacy Adds "Privacy" header if special feature is set to "Default", and not "CBCOM".
Header
Use P-Preferred-
Adds "PPI" header if special feature is set to "Default", and not "CBCOM".
Identity Header
SIP REGISTER
Specifies which address (LAN or WAN address) the device will detect to use it in SIP
Contact Header
Register Contact Header. When set to LAN, Contact header will include local IP from
Uses
ATA in REGISTER messages, while if set to WAN, host/port/contact will be updated from
SIP 401/403/404/407 Via header "received"/"rport" parameters in REGISTER messages.
Default is LAN Address.
SIP T1 Timeout Defines T1 timeout value. It is an estimate of the round-trip time between the client and
server transactions. For example, the HT801 will attempt to send a request to a SIP
server. The time it takes between sending out the request to the point of getting a
response is the SIP T1 timer. If no response is received the timeout is increased to
(2*T1) and then (4*T1). Request re-transmit retries would continue until a maximum
amount of time defined by T2. Default is 0.5 seconds.
HT801 Administration Guide
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