ZyXEL Communications 2602HWNLI-D7A manual Can I make an outgoing Pstn call through P2602HWNLI D7A?

Prestige 2602HWNLI-D7A Support Notes

Can I make an outgoing PSTN call through P2602HWNLI – D7A?

Yes, P2602HWNLI – D7A allows you to make outgoing PSTN call via a prefix number that is defined in the configurable lifeline table. It allows you to store up to 9 pre-stored numbers. If P2602HWNLI- D7A lost power it will by pass to PSTN line to allow you to call out as you where on regular PSTN phone.

VoIP FAQ

What is Voice over IP?

Voice over IP is an emerging technology based on open standards of IEEE, fundamentally the Internet Protocol, that allows voice data to travel across the Internet. There are many method to used this technology, the most common and well known are SIP, and H.323.

How does Voice over IP work?

Basically VoIP is a technic to send voice information in digital form in discrete packets over digital network rather than by using traditional circuit switch (PSTN). To do so we will need an analog to digital converter on sender side to translate the voice (analog signal) to digital than transmit it, and on the receiver end it will also need an analog to digital converter to covert the digital signal back to analog to the person being called can heard the voice.

Why use VoIP?

Traditionally telephony carrier use circuit switching for carrying voice traffic. As circuit switching is designed to carry voice and it does it very well. Than why use IP for voice? As broadband booms, and technology evolve. People now want to communicate through various way not just voice such as email, instant messaging, video and so on. Traditional telephony can not evolve as quickly as the demand and develop new feature on circuit switch takes much time and money. IP is an already exist standard and many type of service already runs on IP, by using IP as a platform integrate service is now possible and low cost where traditional circuit may take long time to achieve.

What is the relationship between codec and VoIP?

In order to transfer voice (analog signal) over IP it first need to be digitized. Codec is a technic to digitize analog signal to digital and vice versa. There are various speech codec available and can be used with VoIP each with it's advantage and disadvantage.

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