Technical information

23


Static or buzzing noises on your line can only occur on the analogue side of the phone system, which consists of your phone and
phone cable. Once the signal is sent through the IAD, it is digitised and does not create static or buzzing. You may wish to perform
the following:
1. Try replacing the telephone cable and/or telephone.
2. Cordless telephones can generate static due to a weak signal connection between the base of the telephone and the handset.
Weak signals can be due to low batteries in your handset, or the recommended range between the handset and base station has
been exceeded.
3. If you are using a wireless router, try moving it away from the IAD as each wireless device may interfere with each other.

Choppy calls are usually caused by high latency or packet loss in the ISP’s network.
1. High latency occurs when it takes too long for the data to be transmitted over your Internet connection.
2. Packet loss occurs when information is lost over your Internet connection.
Either symptom can be caused by ISP (Internet service provider) problems, Internet congestion, or heavy bandwidth usage such as
online gaming or file sharing.

In a voice telephone call, an echo occurs when you hear your own voice repeated. Problems with echo usually originate on the other
end of your call. This is due to latency on your Internet connection, which causes the delayed playback of your voice.
There are two ways echo can occur:
1. Electrically through poor quality phone cables.
2. Acoustically (feedback) through sound waves between the phone’s speaker and microphone.
Try asking the other party to lower the phone volume in order to reduce the feedback of your voice. As a last resort, try different telephone
sets to reduce echo, as the quality of the telephone is important and some telephones have special echo-cancellation technology.

Dropped calls are usually associated with Internet connectivity issues. High latency and packet loss can affect your call.
1. High latency occurs when it takes too long for the data to be transmitted over your Internet connection.
2. High packet loss occurs when information is lost over your Internet connection.
Either symptom can be caused by ISP (Internet service provider) problems, Internet congestion, or heavy bandwidth usage such as
online gaming or file sharing.


The Digital Voice Global service would be temporarily unavailable while the IAD is re-booting and performing the start-up diagnostics or
when there is network interruption. You can resume using the service once you hear the standard dial tone (depending on the model
of IAD, it could take about 2-5 minutes from the time of re-booting).


Yes, you can. When you are physically located in Singapore, you can dial Singapore emergency numbers. For example, you can dial
“999”tocontacttheSingaporePoliceForce.However,sinceDigitalVoiceGlobalisaportableservice,youmayneedtoinformthe
emergency department of your exact location if you need the emergency service at your location.


When you are in an overseas country, e.g. in the US, you cannot call any of the US emergency numbers. You need to use a US-registered
telephone line to make emergency calls in the US. This applies to any other overseas country you are in.


When you are in an overseas country, e.g. in the US, you can still call Singapore emergency numbers using the usual emergency dial
codeslike“999”.YourcallistreatedjustlikeanylocalcallmadeinSingapore.

No, you would not be able to make outgoing calls or receive incoming calls if there is a power failure.

Please report the loss immediately to our Customer Care at 1633. This is important because you are liable for all call charges incurred
until you report the loss to us.

Please call our Customer Care at 1633