Telos NX12 user manual Basic configuration

Basic configuration  27

2.Click on the Telco menu. With ISDN modules installed in both Telco interface positions, you will see a page similar to the one below.

3.Choose the ISDN Protocol. For the USA and Canada, this will usually be Natl.I-1. For Europe and much of the rest of the world, it will be ETS300.

4.For Natl.I-1, enter the SPIDs for each voice channel given to you by the telephone company. Leave this blank for other protocols.

5. Enter the DN (Directory Number) or MSN for each voice channel. The DNs, sometimes called Listed Directory Numbers or LDNs, are your (usually 7-digit) phone number as listed in the telephone directory. They normally do not include the area code.

6.In some cases, you may need to enter 10 digits for your DNs. If you have difficulties with incoming calls, try this.

7.Click Apply, then Reboot Now to activate the ISDN circuits.

Tip

Each ISDN Line has a certain ISDN protocol (or ‘switch type’), which the phone company should have given you. By far the most common protocols in the USA & Canada are National ISDN-1 & National ISDN-2 in which case you should set the Telco setting to Natl.I-1.

If are in the USA or Canada and you do not know what protocol your line is configured for, try Natl.I-1 first. If that does not work, see Section 5.5 for hints on how to guess your protocol.