Telos Zephyr Xstream User Manual page 113

We've included numerous tips on SPIDs and the TELCO setting in Section 11.5 (Detailed Menu
Reference).
MSN/DN 1 & MSN/DN 2
DNs (Directory Numbers) are needed in the USA & Canada, when the ISDN protocol is National
ISDN or DMS‐Custom. These are simply your 7‐digit telephone numbers, as would be found in
the telephone directory.
MSNs (Multiple Subscriber Numbers) are used with ETS 300 (Euro ISDN) and are optional. They
can be used if you are sharing your BRI circuit with other equipment. For more information, see
Section 11 (Detailed Menu Reference).
h
HOT TIP!
The Directory Numbers or DNs (sometimes called Listed Directory Numbers or LDNs) are
your 7-digit phone number as would be found in the Telephone Directory. They normally do
not include the area code.
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IMPORTANT TIP!
Each directory number (DN) will correspond to one SPID. You must enter them to reflect this
relationship. The DN corresponding to SPID1 must be entered as MSN/DN 1 while the DN
corresponding to SPID2 must be entered as MSN/DN 2.
If you experience problems only with incoming calls check your DNs.
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ZEPHYR CLASSIC VS XSTREAM COMPARISON!
Most versions of the Zephyr Classic allow the Directory Numbers to be omitted. The Xstream
and Xport require that these be entered.
USER'S MANUAL
Section 5: GUIDED TOUR of the MENUS 101