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Switch Type It is necessary to tell the TA what type of switch protocol is being used at the Telco central office. The ISDN service provider will give this information to you. For North American operations the only three valid choices are National ISDN-1(NI-1), AT&T 5ESS, and NT1/DMS100 Custom. The most common switch type is National ISDN-1. Back to NetStar ISDN SetupSPID Numbers For most areas in North American, the TA must be told the SPID number of the calling ISDN line, that is, the line to which the NetStar is connected, i.e., your ISDN line. The ISDN service provider in your area provides this number to you.It is important to remember that every time the NetStar is moved, or whenever there is a change in the ISDN line, or even Area Code changes, the SPID and ID number, switch type and possibly other parameters for the TA setup must be updated. NOTE:The SPID number is usually: Area Code+7-digit number+0101 Back to NetStar ISDN SetupMultiple Subscriber numbers (MSN) If you are required to use two SPID numbers, then you must enter MSN numbers. MSN stands for Multiple Subscriber Number. The MSN is also sometime referred to as an LDN, which stands for Local Directory Number. For North American operation, the MSN (LDN) number is just the ten-digit ISDN line number (area code+7 digit number) connected to the NetStar Back to NetStar ISDN Setup |