What is a SPID number and do I need to use it?
A Service Profile ID number is an identification tag used by the central office switch in addressing and handshaking to your ISDN terminal adapter. SPID numbers are used in North America only. If your service provider gives you a SPID number or numbers, you must use them for a one-time setup of your terminal adapter. If your system requires SPID numbers and you have entered them incorrectly or not at all, you will not be able to dial, but you may be able to receive calls. TRANSMISSION MEDIA What is the difference between Dedicated Lines, T1 and ISDN? Dedicated lines are, as the name implies, dedicated connections between two points. Dedicated lines are usually 56 or 64 kb/s, and multiple lines can be combined for higher bit rates. Dedicated lines do not allow dialing into or out of your audio codec. A T1 is a dedicated line with 1.544 Mb/s capacity, which is based on twenty-four 64 kb/s channels. Since the CDQPrima and many other audio codecs need only a fraction of the 1.5 Mb/s capaci
