Grandstream Networks HandyTone-488 User Manual page 32

HandyTone-488 User Manual
Use Random Port
DTMF Payload
Type
Send DTMF
Send Flash Event
Enable Call
Features
Use Bell-style
3-way Conference
Offhook
Auto-Dial
Proxy-Require
Disable Call
Waiting
NAT Traversal
(STUN)
No Key Entry
Timeout
Preferred Vocoder
Default No. If set to Yes, the device will pick randomly-generated SIP and RTP
ports. This is usually necessary when multiple HandyTone ATAs are behind
the same NAT.
This parameter sets the payload type for DTMF using RFC2833
This parameter specify 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. Multiple DTMF transmission schema can be selected.
Default is NO. If set to yes, flash will be sent as DTMF event.
Default is Yes. Advance call features and feature codes functions are supported
locally.
Default setting is No. When it is set to yes, the user will use Bell-style to
initiate conference.
This parameter allows users to configure a User ID or extension number to be
automatically dialed upon offhook. Please note that only the user part of a SIP
address needs to be entered here. The HandyTone ATA will automatically
append the "@" and the host portion of the corresponding SIP address.
Note: Please write down the IP address of the ATA if you use this feature as it
will prevent you to access the IVR and the only way to access the device
configuration is via the web configuration page.
SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.
Default is No.
This setting decides whether the NAT traversal mechanism is activated. It
should be set to "Yes" if the device is behind a NAT router. If no outbound
proxy is configured, a STUN server needs to be set to activate STUN detection
mechanism. Usually ITSP will provide these settings.
If this field is set to "Yes", then the device will periodically (every Keep-alive
interval) send a dummy UDP packet to the SIP server to pinhole the NAT.
Default is 4 seconds.
The HandyTone ATA supports 6 different Vocoder types including G.711 A-
/U-law，G.723.1, G.726-32, G.729A, iLBC.
Users can configure Vocoders in a preference list that will be included with the
same preference order in SDP message.
32
Grandstream Networks, Inc.