Grandstream Networks HandyTone-488 Unregister on, Reboot Layer 3 QoS, Layer 2 QoS, Use DNS SRV

HandyTone-488 User Manual		Grandstream Networks, Inc.
Unregister on	Default is No. If set to yes, the SIP user will be unregistered on reboot.
Reboot
Layer 3 QoS	This field defines the layer 3 QoS parameter which can be the value
	used for IP Precedence or Diff-Serv or MPLS. Default value is 48.
Layer 2 QoS	This contains the value used for layer 2 VLAN tag. Default setting is
	blank.
Use DNS SRV:	Default is No. If set to Yes the client will use DNS SRV for server lookup

User ID is Phone If the HandyTone ATA has an assigned PSTN telephone number, this

Number	field should be set to “Yes”. Otherwise, set it to “No”. If “Yes” is set, a
	“user=phone” parameter will be attached to the “From” header in SIP
	request
Early Dial	Default is No. Use only if proxy supports 484 response
Dial Plan Prefix	Sets the prefix added to each dialed number
No Key Entry	Default is 4 seconds.
Timeout
Use # as	This parameter allows users to configure the “#” key to be used as the
Send Key	“Send” (or “Dial”) key. If set to “Yes”, pressing this key will immediately
	trigger the sending of dialed string collected so far. In this case, this key
	is essentially equivalent to the “(Re)Dial” key. If set to “No”, this “#” key
	will then be included as part of the dial string to be sent out.
Use Random Port	This parameter, when set to Yes, will force random generation of both
	the local SIP and RTP ports. This is usually necessary when multiple
	HandyTone ATAs are behind the same NAT.
NAT Traversal	This parameter defines whether the HandyTone ATA NAT traversal
	mechanism will be activated or not. If activated (by choosing “Yes”) and
	a STUN server is also specified, then the HandyTone ATA will behave
	according to the STUN client specification. Under this mode, the
	embedded STUN client inside the HandyTone ATA will attempt to detect
	if and what type of firewall/NAT it is sitting behind through
	communication with the specified STUN server. If the detected NAT is a
	Full Cone, Restricted Cone, or a Port-Restricted Cone, the HandyTone
	ATA will attempt to use its mapped public IP address and port in all its
	SIP and SDP messages. If the NAT Traversal field is set to “Yes” with
	no specified STUN server, the HandyTone ATA will periodically (every
	20 seconds or so) send a blank UDP packet (with no payload data) to
	the SIP server to keep the “hole” on the NAT open.

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