Telos NX12 Faxable Isdn Order Form for the USA & Canada, NT1s, Terminals and Terminal Types

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with an audio codec such as the Zephyr or Zephyr Xstream, then CSD should be ordered as it is required for audio codec calls.

CSV is for interworking with voice phone service and allows ISDN to interwork with analog phone lines and phones.

You will be ordering one or more ISDN BRI 2B+D circuits with CSV (required) and CSD (optional) on each B channel.

NT1s

The ISDN standard specifies two reference points, the U and the S interfaces. The U is the single-pair bare copper from the Telco CO. A device called a “Network Termination, Type 1” converts this to the two-pair S interface.

In Europe, Asia, South America, and most of the world the NT1 is always provided by the phone company. Therefore, Telos TWOx12s shipped outside the USA & Canada have the S interface. In the USA & Canada the NT1 must be provided by the user, and is therefore built-in to the TWOx12’s ISDN terminal adapter. In this case, the “U” (RJ-11) interface is provided.

Terminals and Terminal Types

Any equipment connected to an ISDN line is a ‘terminal’ – whether phone, computer, or Hybrid. Point-to-point lines support one terminal, while multipoint lines can have up to eight in some applications.

“Terminal Type” is a parameter sometimes requested by the phone people. The appropriate value for the Nx12 varies depending upon protocol and is included on the order forms.

IOC Capability Packages (provisioning package)

More and more 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 (SJA48) jack. We still recommend that you fax them these forms as well.

Hunt Groups

Just as with analog lines, ISDN BRI lines can be placed in a ‘hunt group’ where a single number can be given to callers and the calls will ‘roll over’ from busy channels to idle channels. This is sometimes called ISG (incoming service grouping) or rollover lines. This would usually be a requirement for an on-air phone system. You may choose to exclude 1 or 2 channels from the hunt group (i.e. the Hot line and the Warm line). Be sure to specify to your Telco how you expect this to work.

FAXABLE ISDN ORDER FORM (for the USA & Canada)

The following form can be used to place orders for ISDN lines in the USA & Canada. Com- plete the top portion of the form and send all three pages to the phone company. We suggest that you 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.

You only need to send the first page if the Telco uses IOC(ISDN Order Code Capability) packages for ISDN specification.