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What If I Already Have ISDN Service? 121
For Nortel DMS-100
®
Switches
If your line is provisioned on a Nortel DMS-100
®
switch, then regardless of the
ISDN Ordering Code you choose, you cannot have simultaneous voice and data on
the same phone number because of a limitation with the central office switches.
What If I Already Have
ISDN Service?
If you already have ISDN service installed for your ISDN LAN Modem and you used
an ISDN Ordering Code (IOC) other than U/EZ-ISDN 1 or V/EZ-ISDN 1A (for
example, you may have ordered Capability Package S1, 3Com's prior
recommendation for ISDN LAN Modem firmware version 5.00, which did not
include support for supplementary voice services), you will need to make changes
to your line if you wish to use all the supplementary voice services supported by
ISDN LAN Modem, firmware version 5.1.0 or later.
How S1 Differs from
U/EZ-ISDN 1 and
V/EZ-ISDN 1A
Capability Package S1 is a special ordering code which provides support for
simultaneous voice and data on the same Directory Number where Packages
U/EZ-ISDN 1 and V/EZ-ISDN 1A do not. S1 also provides Additional Call Offering
(ACO) -- which allows for Call Waiting and Dynamic Bandwidth Allocation -- on
both telephone numbers, whereas U/EZ-ISDN 1 and V/EZ-ISDN 1A provide ACO
automatically on Directory Number 1 only.
S1 does not, however, provide support for the other supplementary voice features
supported by the ISDN LAN Modem (Call Conference, Call Transfer, and Call
Forwarding) which are available under U/EZ-ISDN 1 and V/EZ-ISDN 1A. (Note, also,
that S1 does not support Voice Mail.)
All three ordering codes, S1, U/EZ-ISDN 1, and V/EZ-ISDN 1A, provide automatic
support for Caller ID on both Directory Numbers. None of them provides
automatic support for Caller ID Blocking.
If You Are Currently Using Capability Package S1 and Would Like to Add
Supplementary Voice Services
If you are currently using Capability Package S1 and would like to use all or some
of the supplementary voice services supported by the ISDN LAN Modem, firmware
version 5.1.0 or later, 3Com recommends that you call your telephone company
and ask to have the following extra services added to Directory Number 1,
Directory Number 2, or both, on your existing line (Note that there may be an
additional charge to have these services added.):
■ For Voice Mail, ask for Voice Mail
■ For Call Conference (Three-Way Calling) and Call Transfer, ask for Flexible Call
Offering (FCO)
■ For Call Forwarding, ask for Call Forwarding Variable
■ For outgoing Caller ID Blocking, ask for Calling Number Privacy
Some telephone companies may choose to refer to the Flexible Calling features by
unique terminology.
If You Are Unable to Have Supplementary Voice Services Added to S1
If your telephone company does not allow piecemeal additions to your line
provisioning (for example, ACO and FCO are not available on a Lucent 5ESS
Custom Switch), 3Com recommends that you change your line to Package U or