Asus ISDNLINK TA-200 Manual

© COPYRIGHT OF ASUSCOM NETWORK INC.1Chapter 1 IntroductionThe proliferation of PCs and LANs with bandwidth intensive applications has generateda powerful demand for high-speed connections. The worldwide standardization ofISDN, combined in many countries with its growing availability and falling cost make it anatural choice for enhancing data throughput.ISDNLINK ™TA-200 terminal adapters provide high-performance solutions for Internetaccess, file transfer, remote access service, and running existing modemapplications through the ISDN network.ISDNLINK™ TA-200 External Terminal AdaptersThere are two ISDN interface options of ISDNLINK™ external TA (Terminal Adapter):ST or U interface. If you purchased the ST interface terminal adapters (TA-200ST andTA-200ST-D), you need an ISDN NT1 device to connect to the ISDN exchange (theNT1 box should normally be provided by your phone company). If you purchased theU interface terminal adapters (TA-200U and TA-200U-D), they can directly connect tothe ISDN switch. The TA-200ST and TA-200U devices support two a/b (POTS)analog ports with connection through a supplied RJ-11 extension cable (in the UKadapters are supplied for the standard BT connections). The TA-200ST-D and TA-200U-D models provide the data port connection without a/b (POTS) ports.All of the current analog devices, including telephone set, G3 fax, answering machine,modem, and PBX trunk line can be connected to the a/b port (RJ-11 jack/POTS ports)1.The data transmission rate can be up to 64 Kbps while a normal analog communicationis taking place on on-line, or up to 128 Kbps through Multilink PPP connection usingboth digital lines.Why ISDN?The ISDN (Integrated Services Digital Network) is the standard for carrying both dataand voice simultaneously. ISDN BRI (Basic Rate Interface) line provides two B-Channels for voice or data transmission. Each B-Channel can provide datatransmission of up to 64 Kbps. The ISDN network uses the same transmission linesas the existing analog telephone network, but uses a digital signal and higherbandwidth between the central office (telephone company) and the customer. ISDN isnot only much faster than standard modems; it also provides an extremely reliable andstable digital connection.1 Please note that the POTS analogue ports on the TA200 device, in common with most PBX, terminaladapters and fax switches, supply a reduced ring voltage. That is to say the ring voltage is lower thanthat provided on a standard PSTN phone line. This does mean that in very rare circumstances someanalogue equipment may not be able to detect an incoming call.