3Com 3C892 manual For Nortel DMS-100Switches

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 If you already have ISDN service installed for your ISDN LAN Modem and you used

ISDN Service?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 Capability Package S1 is a special ordering code which provides support for U/EZ-ISDN 1 and simultaneous voice and data on the same Directory Number where Packages

V/EZ-ISDN 1A 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