Before You Begin - Huawei B2268H User Manual

LTE TDD B2268H
User Guide
Device, it sends a SIP message over the network asking the other device (the number you dialed)
to take part in the call.
SIP Accounts
A SIP account is a type of VoIP account. It is an arrangement with a service provider that lets
you make phone calls over the Internet. When you set the LTE Device to use your SIP account
to make calls, the LTE Device is able to send all the information about the phone call to your
service provider on the Internet.
Strictly speaking, you don't need a SIP account. It is possible for one SIP device (like the LTE
Device) to call another without involving a SIP service provider. However, the networking
difficulties involved in doing this make it impractical under normal circumstances. Your SIP
account provider removes these difficulties by taking care of the call routing and setup -
figuring out how to get your call to the right place in a way that you and the other person can
talk to one another.
Voice Activity Detection/Silence Suppression
Voice Activity Detection (VAD) detects whether or not speech is present. This lets the LTE
Device reduce the bandwidth that a call uses by not transmitting "silent packets" when you are
not speaking.
Comfort Noise Generation
When using VAD, the LTE Device generates comfort noise when the other party is not speaking.
The comfort noise lets you know that the line is still connected as total silence could easily be
mistaken for a lost connection.
Echo Cancellation
G.168 is an ITU-T standard for eliminating the echo caused by the sound of your voice
reverberating in the telephone receiver while you talk.
Use this screen to maintain basic information about each SIP account. You can also enable and
disable each SIP account, configure the volume, echo cancellation and VAD (Voice Activity
Detection) settings for each individual phone port on the LTE Device.
How to Find Out More
See Section 16.6 for advanced technical information on SIP.

13.1.2 Before You Begin

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Before you can use these screens, you need to have a VoIP account already set up. If you
don't have one yet, you can sign up with a VoIP service provider over the Internet.
You should have the information your VoIP service provider gave you ready, before you
start to configure the LTE Device.
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