Telos Zephyr Xstream User Manual page 147

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DEEP TECH NOTE!
The actual 2 B channels (i.e. timeslots) of the BRI are assigned on a per call basis. Therefore,
from a theoretically correct viewpoint, Lines 1 and 2 do not fully correspond to B1 and B2.
From the perspective of telephone network routing, each B channel appears to be a separate
line with its own number and independent dial‐out capabilities. Since each has to be dialed or
answered separately, they appear to be "lines" to users also. To reduce confusion (hopefully)
for non‐technical users, we refer to a B channel as a "line" on the Zephyr Xstream's menus.
SPIDs
Service Profile IDentification numbers (SPIDs) are only required with the Zephyr when you are
using the National I‐1 or DMS Custom functional ISDN protocols in the USA. This number is given
to the user by the phone company and must be entered correctly into the Zephyr Xstream in
order for the connection to function. SPIDs usually consist of the phone number plus a few
prefix or suffix digits. There is frequent confusion between telephone numbers and SPIDS, even
among Telco personnel. While the SPID generally includes the corresponding phone number,
this is not necessarily the case.
For numerous additional tips on SPIDs, see Section 11 (Detailed menu Reference).
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ISDN TIP!
ETS 300 (Euro ISDN) and INS 64 (Japanese ISDN) users should disregard all references to
SPIDs. These ISDN protocols do not have SPIDs! If your ISDN configuration uses MSNs,
they may be entered in the DN/MSN menu selection of the TEL menu.
If you are using the "National ISDN‐1" (Natl I‐1) or the "DMS Custom" functional (DMS Cust)
protocol, your Telco service representative must give you one or two SPID numbers. You should
get one SPID for each B channel you ordered.
Upon power‐up, connection of the ISDN line, or reboot, the Zephyr Xstream and the Telco
equipment go through an initialization/identification routine. The Zephyr Xstream sends the
SPID(s) and, if it is correct, this fact is signaled by the network and "Ready" will be displayed for
the status of that B channel. Thereafter the SPID is not sent again to the switch.
Realtors remind buyers that the three most important factors of real‐estate success are
Location, Location, and Location! We want to remind you that the three most important factors
to ISDN success are: Get the SPIDS, GET THE SPIDs, please
USER'S MANUAL
get the SPIDs!
Section 7: ISDN BASICS 135