Release & Upgrade
NeeHau Client V2.0.0.23 (with OM20/20G/50/50G)
OM20G V177 P2
OM50G V177 P2
OM80E V177 P3
OM200G V177 P3
MX8G V367
HX4G V367
OM20 V134.P4
OM50 V134.P4
OM500 V121.P3

FAQ
Analog VoIP adapter
Can voip phones be used at home?
Are VoIP calls secure and can the call be encrypted?
How SIP works in the VoIP Gateway
General
Network and Improper Operation
Configurations
Voice Quality
Firmware Upgrade

Application Notes
How to Integrate MX Gateway with OM IP-PBX
Interconnect Two PBXs with FXO Gateways
Interconnect Two or More Extension Lines with FXS Gateways
Connecting MX100G-S SIP-ISDN Gateway to Elastix
Connecting MX100G-S SIP-ISDN Gateway to Asterisk
Expanding PBX Extensions to Remote Sites through IP Network
Multi-site Configuration for Gateways with Analog PBX
How to Troubleshoot Caller ID Detection Issues on FXO Port
Security Configuration Guide for New Rock OM Series IP-PBX
Connecting FXO Gateway to Asterisk
Connecting FXO Gateway to Elastix
Tie Trunk Configuration for OM with Elastix

Training Materials
What is VoIP gateway?
What’s the Difference between VoIP Gateway and SIP Trunk?
Smart Switchboard Introduces Exclusive Premium Customer Services
What's the Difference Between VoIP Gateway and ATA?
What's the Difference Between VoIP gateway and SBC?
New Rock’s New Gateway Security measures
Global VoIP Gateway Service Provider
How to Setup VoIP Gateway - A Complete Installation Guide
What is HX&MX VoIP Gateway Default Password?
Auto Provisioning
Six Practices for Audio Security
“PSTN failover” - Strong Support for High-availability IP Audio Communications
New Rock IP-PBX: Your All-In-One IP Office Telephony System
Connecting E1/T1-Based PBX to IP Telephony Networks
Popular IP-PBX Features Favored by Highly Efficient Officers
Five-star Customer Services
Top Three Advantages of Gateways with Imbedded VPN Clients
Low-Cost, High-Quality Gateway
Smart FoIP
Two Typical Applications for Telephone Networks
IPv6’s Top Three Advantages in VoIP Applications
MX100G-S SIP-ISDN Trunking Gateway Training
MX Series VoIP Gateway Training

Demo

Installation & Maintenance
IP-PBX Installation (Video)
OM20G&OM50G Quick Installation Guide
OM80E Quick Start Guide
OM200G Quick Start Guide
OM500 Quick Installation Guide
HX4G&MX8G Quick Reference Guide
MX60E Quick Installation Guide
MX120G Quick Installation Guide
MX100G-S Quick Start Guide
SX3000 Quick Installation Guide
PT2400 Quick Installation Guide
PT4800 Quick Installation Guide

Others
Manuals
Datasheet
Marketing Materials

Videos
USER EXPERIENCE IMPROVEMENT INITIATIVE
USER LICENSE AGREEMENT
用户许可使用协议
用户体验改进计划
Voice Quality
Update Time:2018-04-18 14:19:56 Browse Times:2390 Amount Downloads:1

Q. How to remove the buzzing or humming noise during the call?

A. Usually if the grounding environment is not properly installed, it will bring more noise or AC interference (50/60 Hz noise or line frequency hum) with the device. Thus, it is recommended to check if the grounding wire is connected properly. You can perform the following procedures:
-  Avoided sharing of AC power outlet with other devices (as this may generate electrical interference).
-  Check if the rack is earth grounded properly.
-  Isolate the equipment from the rack.

-  Cut off the ground pin on the power plug.


Q. What can I do if I can hear a sound like a DTMF tone during the call without even pressing any key on the keypad?

A. Background noise disturbance will generate the sound that can be pick up by the microphone on the handset. This issue is also common to hands-free device. In order to prevent the false detection of DTMF signal, you need to increase the DTMF actual detection threshold on the VoIP device by system configuration.

If you are using OM20/OM50/OM80E/OM200G/OM500

Go to Advanced > DTMF, then input 32 or 48 on DTMF detection duration increment against talk-off field (The range must be 16 to 240 in multiples of 16).

If you are using HX4E/MX8A/MX60E/MX120G

Go to Basic > System, then input 32 or 48 on the DTMF detection duration increment against talk-off field (The range must be 16 to 240 in multiples of 16).


Q. What can I do if the voice volume is too low (or high) on an extension during the call?

A. When the voice volume is too low (or high) on an analog extension side or internal party, you can increase (or decrease) the Gain to terminal parameter value by line configuration. Test several values higher (or lower) than default value=0 until you get the normal voice volume.

If you are using HX4E/MX8A/MX60E/MX120G

Go to Line > Advanced, increase (or decrease) the Gain to terminal value. 

If you are using OM20/OM50/OM80E/OM200G

Go to Extension > Analog > Advanced, increase (or decrease) the Gain to terminal value. 


A. When the voice volume is too low (or high) on the other side or external party, you can increase (or decrease) the Gain to IP parameter value by line configuration. Test several values higher (or lower) than default value=0 until you get the normal voice volume.

If you are using HX4E/MX8A/MX60E/MX120G

Go to Line > Advanced, increase (or decrease) the Gain to IP value.

If you are using OM20/OM50/OM80E/OM200G

Go to Extension > Analog > Advanced, increase (or decrease) the Gain to IP value.


Q. What can I do to reduce the echo that I heard during the call?

A. When the analog extension side or internal party has echo, you can decrease the Gain to terminal parameter value by line configuration. Test several values lower than default value=0 until you get the normal voice volume.

If you are using HX4E/MX8A/MX60E/MX120G

Go to Line > Advanced, decrease the Gain to terminal value. 

If you are using OM20/OM50/OM80E/OM200G

Go to Extension > Analog > Advanced, decrease the Gain to terminal value. 


A. When the other side or external party has echo, you can decrease the Gain to IP and Gain to PSTN parameter value by line and trunkconfiguration. Test several values lower than default value=0 until you get the normal voice volume.

If you are using HX4E/MX8A/MX60E/MX120G

Go to Line > Advanced, decrease the Gain to IP value. 
Go to Trunk > Advanced, decrease the Gain to PSTN value.

If you are using OM20/OM50/OM80E/OM200G

Go to Extension > Analog > Advanced, decrease the Gain to IP value. 

Go to Trunk > Analog trunk > Advanced, decrease the Gain to PSTN value. 


Q. How can I eliminate the crosstalk on an analog extension? (Conversation on another extension is heard during a call)

A. Generally, crosstalk is caused by telephone line short-circuits. Check the connection line of the FXS port and remove the line fault.


Q. How can I remove echo and noise during the call?

A. To mitigate the echo and noise related issues, make sure that Echo cancellation is enabled and FXO impedance is complex. You can perform the following procedures:

If you are using HX4E/MX8A

Go to Trunk > Feature, enable Echo cancellation.

Go to Trunk > Advanced, set Impedance as Complex.

If still has this issue, you can try to configure the echo and noise related parameters

- ECHO_TAIL, ID =300. Value range is 1-300 (Adjust every 30ms. From our testing results, 30ms is the best value, so we can start from 30ms then increase the value if we want to adjustit)  

- Input the xml command on the URL: https://x.x.x.x/xml?method=gw.config.set&id300=30.
ECHO_CANCEL_LEN, ID =66. Value range is 16-64 (Adjust every 16ms. From our testing results, 64ms is the best value, so we can start from 64ms then decrease the value if we want to adjust it.)

- Input the xml command on the URL: https://x.x.x.x/xml?method=gw.config.set&id66=64.


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