Grandstream Networks GHP6 Series Administration Manual page 21

Configure if the SIP account needs to add Auth header in RE-REGISTER.
Add Auth
Header On
If the option is checked, device will always add authentication header in REGISTER.
RE-
REGISTER
If the option is unchecked, device will only send authentication for the first REGISTER.
Enable SIP
Enables SIP OPTIONS to track account registration status so the phone will send periodic OPTIONS message
OPTIONS
to server to track the connection status with the server. The default setting is "No".
Keep Alive
SIP
Configures the time interval when the phone sends OPTIONS message to SIP server. The default setting is 30
OPTIONS
seconds, which means the phone will send an OPTIONS message to the server every 30 seconds. The default
Keep Alive
range is 1-64800.
Interval (s)
Configures the maximum times of sending OPTIONS message consistently from the phone to server. Phone
SIP
will keep sending OPTIONS messages until it receives response from SIP server.
OPTIONS
Keep Alive
The default setting is "3", which means when the phone sends OPTIONS message for 3 times, and SIP server
Maximum
does not respond this message, the phone will send RE-REGISTER message to register again. The valid range
Tries
is 3-10.
Configures the phone system to subscribe voice message service. If it is set to "Yes", the phone system will
Subscribe
periodically send SIP SUBSCRIBE message for Message Waiting Indication service. GXV3350 phone system
for MWI
supports both synchronized and non-synchronized MWI. Default is "No".
Determines if the Privacy header will be presented in the SIP INVITE message and if it includes the caller info
Use Privacy in this header. If it is set to "Default", the Privacy Header will be omitted in INVITE when "Huawei IMS" special
Header feature is active. If set to "Yes", it will always be presented. If set to "No", it will always be omitted. The default
setting is "Default".
Specifies if the P-Preferred-Identity Header will be presented in the SIP INVITE message. If set to "default",
the P-Preferred-Identity Header will be omitted in SIP INVITE message when "Huawei IMS" special feature is
Use P-
active. If set to "Yes", the P-Preferred-Identity Header will always be presented.
Preferred-
Identity
If set to "No", it will be omitted.
Header
The default setting is "Default".
Use P-
Access-
Use P-Access-Network-Info header in SIP INVITE message.
Network-
Default setting is Yes.
Info
Header
Use P-
Use P-Emergency-Info header in SIP INVITE message.
Emergency
-Info
Default setting is Yes.
Header
Configures whether to use MAC header. If set to "No", all SIP REGISTER messages will not contain MAC
Use MAC
header; If set to "Only for REGISTER", MAC header will only be included in SIP REGISTER and UNREGISTER
Header
messages; If set to "Yes to All SIP", all outgoing SIP REGISTER messages will contain MAC header.
Configures whether to add MAC address in User-Agent header. If set to "No", all outgoing SIP messages will
Add MAC not attach MAC address to the User-Agent header; If set to "Yes except REGISTER", all outgoing SIP
in User- messages except REGISTER message will attach the MAC address to the User-Agent header; If set to "Yes to
Agent All SIP", all outgoing SIP messages including REGISTER message will attach MAC address to the User-Agent
header.