In order to cooperate with the majority of manufacturers who enter VoIP trade for the first time, Debole Technology develops the common machine board to enable customers to begin to verify developing earlier and design product. The common board is divided into voice passway type and gateway type. The former is to change network signal into audio frequency input and output directly, and offers bunches of communication, which is suitable for adding VoIP function on original ordinary telephone or cordless telephone. The latter is to change network signal into an ordinary telephone line directly, which is the standard gateway type. It is suitable for adding VoIP function on ADSL MODEN, small family router or VPN equipment.

Voice Passway Type
The voice passway type is compatible with two kinds of protocol stacks at the same time, which are H.323 V4 or SIPV2. It supports full duplex handsfree, DTMF yard, and many modes of voice codecs such as g.729, g.711, g.723, and GSM. The orders of bunches can be customized. The way of connecting interface is as follows:

Gateway Type
Gateway type is compatible with two kinds of protocol stacks at the same time, which are H.323 V4 and SIP V2. Voice passway supports G.165 echo offset algorithm, DTMF yard, the incoming call display and output, and many voice codecs such as g.729, g.711, g.723, and GSM. The feed and shaking bell are compatible with many patterns such as China, Europe (TBR-21), U.S.A. (Part 68 ),etc. The incoming call display and output can choose such patterns as China, U.S.A. Europe, etc.. Its way of connecting is as follows:

The size of the machine board is as follows: