Grandstream Networks HT814 Administration Guide

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HT812/HT814 Administration Guide
iLBC Payload type
Determines payload type for iLBC. The valid range is between 96 and 127. Default is 97.
OPUS Payload
Type
Determines payload type for OPUS. The valid range is between 96 and 127. Default is
123.
VAD
Allows detecting the absence of audio and conserves bandwidth by preventing the
transmission of "silent packets" over the network. Default is No.
Symmetric RTP
Changes the destination to send RTP packets to the source IP address and port of the
inbound RTP packet last received by the device. Default is No.
Fax Mode
Specifies the fax mode : T.38 (Auto Detect) FoIP by default, or Pass-Through (must use
codec PCMU/PCMA)
Re-Invite after Fax
Tone Detection
Mode
Permits the unit to send out the re-INVITE for T.38 or Fax Pass Through if a fax tone is
detected. Default is Enabled
Jitter Buffer Type
Selects jitter buffer type (Fixed or Adaptive) based on network conditions.
Jitter Buffer Length
 High (initial 200ms, min 40ms, max 600ms) Note: not all vocoders can meet the
high requirement.
 Medium (initial 100ms, min 20ms, max 200ms).
 Low (initial 50ms, min 10ms, max 100ms).
SRTP Mode
Selects SRTP mode to use (“Disabled”, “Enabled but not forced”, or “Enabled and
forced”). Default is Disabled
It uses SDP Security Description to exchange key. Please refer to
SDES: https://tools.ietf.org/html/rfc4568
SRTP: https://www.ietf.org/rfc/rfc3711.txt
Crypto Life Time
Adds crypto life time header to SRTP packets. Default is Yes.
SLIC Setting
Depends on standard phone type (and location).
Caller ID Scheme
Selects the caller id scheme, for example : Bellcore/Telcordia, ETSI-FSK …
DTMF Caller ID
Defines the start and stop tones.
Polarity Reversal
Reverses the polarity upon call establishment and termination. Default is No.
Loop Current
Disconnect
Allows the traditional PBX used with HT812/HT814 to apply this method for signaling call
termination. Method initiates short voltage drop on the line when remote (VoIP) side
disconnects an active call. Default is No.
Loop Current
Configures the duration of voltage drop described in topic above. HT812/HT814 support

Grandstream Networks HT814 Specifications

General

Brand	Grandstream Networks
Model	HT814
Category	Telephone Accessories
Language	English