Isdn Service Ordering Checklist; What Are Spids - ZyXEL Communications Omni TA128 User Manual

Chapter 19 - Ordering Your ISDN Line

ISDN Service Ordering Checklist

1. Confirm the switch that has been installed. If it is an AT&T 5ESS switch, then the
phone company must inform you whether it is Point-to-Point or Multi-point. Either
option must then be programmed into the Omni TA128.
2. Note whether the switch is using a Custom protocol or National ISDN-1 (NI-1).
3. If the line is not an AT&T Point-to-Point, you should receive a unique SPID number
for each of the B channels. Then both SPID numbers must be programmed into the
Omni TA128. The configuration will be explained in the following chapters. Please
take careful note of the prefixes and suffixes.
4. Confirm the 7-digit Local Directory Number (LDN) for each of the B channels.
Note: These parameters are very important in installing the Omni TA128. They
will allow the Omni TA128 to perform to its maximum potential.

What are SPIDs?

The Service Profile Identifier (SPID), is a string of 3 to 20 numeric digits that is assigned
to the user by the telephone company. The user must program the SPID into the
terminal. The terminal will send this information (SPID) to the central office before it is
initialized. When the switch receives the SPID, it will then allow the user to begin to dial
out and receive calls.
19-5