Grandstream Networks HandyTone-286 user manual Grandstream Networks, Inc

HandyTone -286 User Manual Grandstream Networks, Inc.

iLBC payload type

Silence Suppression

Voice Frames per

TX

Fax Mode

Layer 3 QoS

Layer 2 QoS

Allow incoming SIP messages from SIP proxy only

Use DNS SRV

User ID is phone number

This defines the iLBC payload type. The default setting is 97. The valid range is between 96 and 127.

This controls the silence suppression/VAD feature of G723 and G729. If set to “Yes”, when a silence is detected, small quantity of VAD packets (instead of audio packets) will be sent during the period of no talking. If set to “No”, this feature is disabled.

This field contains the number of voice frames to be transmitted in a single packet. When setting this value, the user should be aware of the requested packet time (used in SDP message) as a result of configuring this parameter. This parameter is associated with the first vocoder in the above vocoder Preference List or the actual used payload type negotiated between the 2 conversation parties at run time.

e.g., if the first vocoder is configured as G723 and the “Voice Frames per TX” is set to be 2, then the “ptime” value in the SDP message of an INVITE request will be 60ms because each G723 voice frame contains 30ms of audio. Similarly, if this field is set to be 2 and if the first vocoder chosen is G729 or G711 or G726, then the “ptime” value in the SDP message of an INVITE request will be 20ms.

If the configured voice frames per TX exceeds the maximum allowed value, the phone will use and save the maximum allowed value for the corresponding first vocoder choice. The maximum value for PCM is 10(x10ms) frames; for G726, it is 20 (x10ms) frames; for G723, it is 32 (x30ms) frames; for G729/G728, 64 (x10ms) and 64 (x2.5ms) frames respectively.

T.38 (Auto Detect) FoIP by default, or Pass-Through (must use codec PCMU/PCMA)

This field defines the layer 3 QoS parameter which can be the value used for IP Precedence or Diff-Serv. Default value is 48

This setting includes two fields. The 802.1Q/VLAN Tag contains the value used for layer 2 VLAN tag. Default setting is blank. And 802.1p priority value contains the value of the priority value.

If set to “Yes”, the device will ignore any SIP message that does not come from the IP address (Source IP in the IP header) that it is registered to. Default is No.

This parameter controls whether the IP phone supports the DNS SRV route function.

If the HandyTone-286 has an assigned PSTN telephone number, then this field will 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.

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