Black Box Explains... Analog and ISDN Modems
Analog and ISDN modems.
Analog modems transmit data over ordinary phone lines. Data transmitted across analog lines is represented by a continuously varying electrical signal.
ISDN modems transmit over digital lines running at 64 kbps. Data is transmitted over either one or two 64-kbps voice/data channels and is encoded as either a binary 1 (one) or 0 (zero). When there are ISDN modems on each end of the line, they are known as terminal adapters.
Terminal adapters enable data to be transmitted or received over ISDN at speeds up to 128 kbps. Terminal adapters also enable you to connect non-ISDN equipment such as phones or PCs to ISDN.
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