Telos Zephyr Xstream, User Manual

Page: 347 / 381

USER’S MANUAL
Appendix 8 – Ordering ISDN for the USA and Canada 335
IOC Capability Packages (provisioning package or ordering code)
Increasingly Telcos are using ISDN Ordering Code (IOC) capability packages for ISDN ordering
(National ISDN protocol only). If your telephone company uses these, you need only tell them
you need IOC package “S” and an RJ ‐ 11 style jack. We recommend that you fax them these
forms in any case, just to be sure.
Long-Distance Digital Connectivity
Long ‐ distance connectivity is routinely available in most parts of the USA from the “big ‐ three”
carriers: AT&T, Sprint, and MCI (not Worldcom, but MCI). Connectivity between any two given
points is occasionally somewhat variable. The “dial 1+” default carrier may be chosen at the
time you order the line, just as with traditional voice lines (Note: you must specify the carrier for
each B channel). As with voice lines, you may choose a carrier on a per ‐ call basis by prefixing
the number with the 101XXXX carrier selection code.
You must dial the full number, including the 1 or 011 + country code following the prefix.
Some long ‐ distance connections are limited to 56kbps/channel. This limitation is becoming
more rare. There is no certain way to know in advance. In addition, some carriers may work at
64Kbps and not 56Kbps. So, you may need to try both.
The Zephyr Xstream provides standard rate adaptation (officially known as ‘CCITT V.110’) from
56 to 64 kbps and vice versa when required. Bitrate adaptation happens automatically within
the Zephyr Xstream depending upon the rate selected by the calling party. Since the Zephyr
Xstream cannot communicate at both rates simultaneously, it will ignore rate adaptation
information on the second incoming call remaining at the rate set for the prior call.
In our experience, the only sure way to know if a connection given between to particular points
will work is to try it, first at 64kbps and then at 56kbps if the higher rate fails.
F A X A B L E I S D N O R D E R F O R M S F o r t h e U S A & C a n a d a
Following forms should be used to place orders for ISDN lines in the USA & Canada.
Since ISDN is very complex in those countries, it is necessary to use these forms or you
may experience problems. These should give the phone company all of the information
they need. The majority of installations, if ordered in writing, with this information, go
smoothly . If you do experience problems Telos technical support is here to help. You
may also wish to look at our troubleshooting information in the Zephyr Xstream manual.
Complete the top portion of the form and send all three pages to the phone company.
Keep the form handy and show it to the installer when he or she puts in your line and
ask the installer to verify with the switch programmer (at the central office) that your
line is configured as ordered.