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33
Fax Settings
the sound quality and occupied bandwidths are also different. It is recommended to use the default provided (G.723.1) because it occupies less bandwidth and will provide better sound quality.
Jitter Buffer: Adjusts the jitter to receive a packet. If the jitter range is too wide, it will delay voice transmission.
Silence Suppression: If one side of a connection is not speaking, the system will stop sending voice data (package) to decrease bandwidth usage.
Echo Canceling: Prevents poor telecommunication quality caused by echo interference.
Codec: Choose the codec that you needs.
Packet Time: Defines how long the gateway sends a RTP packet-voice packet- to the other side. The smaller the value, the more bandwidth usage. The larger the value, the more voice delay.
Approximate Bandwidth Require: The bandwidth required varies with Codec format and packet time.
T.38: The T.38 protocol is used for better and faster facsimile transmission. When this function is enabled, the following fax and voice parameter settings will be disabled, so it is recommended to enable this function to gain better fax quality. When this function is enabled, please select UDP, TCP, or AUTO. If selecting TCP and some routers cannot use the Fax function, please select UDP instead.
Enable High Quality: The system sends the same FAX frame twice to get a high quality of the FAX. It requires more bandwidth.
Enable Secure T.38: This allows gateways to send faxes on both sides.
T.30: The system uses T.30 as the protocol for fax transmission. The parameter settings are the same as for voice transmission. However, enabling the fax function will consume more network resources and will affect transmission quality.
FAX Detect sensitivity:Used to adjust the sensitivity of detection as to whether a phone call is a FAX or not.
This is used as a standard to determine whether or not to hang up the phone. The system will hang up the phone automatically to avoid keeping the line engaged if the detected volume is below the Silence Detection Threshold and the time exceeds the Drop Silent Call Timeout.
Silence Detection Threshold: Set the volume as a standard.
Drop Silent Call Timeout: Set the time to hang up the phone.
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Table of contents
- 5 Introduction
- 5 Product Overview
- 6 Product Features
- 7 Hardware Description
- 8 Installation and Applications
- 8 Network Interface
- 8 Gateway Assigned with a Public IP Address
- 9 Gateway in a NAT network
- 10 Telephone Interface Description
- 10 Example for DVG2016S
- 11 Setting the Gateway through IVR
- 11 IVR (Interactive Voice Response)
- 13 IVR Functions Table
- 15 IP Configuration Settings—Setting IP Configuration of WAN Port
- 18 Setting a Gateway with WEB Browser
- 18 Network Settings (WAN)
- 23 Network Settings (LAN)
- 24 QoS Settings
- 25 NAT/DDNS
- 27 Telephony Settings
- 33 Calling Features
- 35 Advanced Options
- 36 Line Settings
- 36 Codec
- 37 Fax Settings
- 39 Digit Map
- 39 Phone Book
- 39 Speed Dial
- 40 Caller Filter
- 40 ACL for Management
- 41 CDR Settings
- 41 Language
- 41 CPT/Cadence Settings
- 42 System Information
- 43 RTP Packet Summary
- 43 STUN Inquiry
- 43 Ping Test
- 44 Backup/Restore
- 45 Provision Settings
- 45 System Operations (Save Settings)
- 46 Software Upgrade
- 46 Logout
- 47 IP Sharing Functions