Grandstream Networks HT-286 User Manual
Page 21
Grandstream Networks, Inc.
HT–286 User Manual
Page 21 of 28
Firmware 1.1.0.31
Last Updated: 1/2009
NAT Traversal
This parameter defines whether the phone NAT traversal mechanism will be
activated or not. If activated (by choosing “Yes”) and a STUN server is also
specified, then the phone will behave according to the STUN client
specification. Under this mode, the embedded STUN client inside the phone
will attempt to detect if and what type of firewall/NAT it is behind by sending
appropriate request to the specified STUN server.
If this field is set to “Yes” with no specified STUN server, then the phone will
only periodically (every 20 seconds by default) send a blank UDP packet
(with no payload data) to the SIP server to keep the mapped port open on the
NAT.
keep-alive interval
The HandyTone-286 sends a UDP package to the SIP server periodically in
order to keep the port open on the router. This parameter defines the interval
time that HT286 send the UDP package. The default setting is 20 second.
Use NAT IP
NAT IP address is used in SIP/SDP message. Default is blank.
Use STUN keep-alive
to detect networks
connectivity
Use STUN keep-alive to detect WAN side network problems. If keep-alive request
does not yield any response for configured number of times, the device will restart the
TCP/IP stack. If the STUN server does not respond when the device boots up, the
feature is disabled.
Proxy-Require
SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.
SUBSCRIBE for MWI
Default is “No”. When set to “Yes” a SUBSCRIBE for Message Waiting
Indication will be sent periodically
Off hook
Auto-Dial
This parameter allows the user to configure a User ID or extension number to
be automatically dialed upon off hook. Please note that only the user part of a
SIP address needs to be entered here. The phone will automatically append
the “@” and the host portion of the corresponding SIP address.
Enable Call Feature
Default is Yes. If set to “Yes”, call features using star codes are supported
locally.
Use Bell-style 3-way
conference
Conference mode, default option is No. If set to yes, the feature code for
coference *23 would be disabled.
Disable Call Waiting
Default is No.
Disable Call-Waiting
Caller-ID
Default is No.
Send DTMF
This parameter specifies the mechanism to transmit DTMF digit. There are 3
modes supported: in audio which means DTMF is combined in audio signal
(not very reliable with low-bit-rate codec), via RTP (RFC2833), or via SIP
INFO.
DTMF Payload Type
This parameter sets the payload type for DTMF using RFC2833
Send Flash Event
Default is No. If set to yes, flash will be sent as DTMF event.
Onhook Threshold
The amount of time the hookflash is pressed that will cause the device to on
hook. Default is 800ms.
FXS Impedance
Selects the impedance of the analog telephone connected to the Phone port.