Tie Lines - AT&T Merlin II Release 3 System Manual

Tie Lines

DESCRIPTION
CONSIDERATIONS
3-130 MERLIN II System Features
NOTE: Connecting a tie line requires special knowledge of telephone
networks. See your authorized AT&T representative if you would like
to administer your system for a tie line.
If your system has a tie line module, you can make calls to a specific location,
such as a branch office, on a private line that connects you directly to that
location. You can direct calls to an attendant, a phone, or to a data station, such
as a modem or facsimile machine. Calls on your tie line can be incoming only,
outgoing only, or both ways.
When a tie line is connected so that calls ring only at the attendant console, it's
referred to as automatic ringdown. If a tie line is connected so that you can dial
specific intercom numbers, it's referred to as a dial repeating tie line.
The factory set inward dial plan numbers for dial repeating tie lines (the
numbers that people use to call your telephones) are 4010 through 4129 and
coincide with the factory set intercom numbers (4010=intercom 10).
Dial repeating tie lines should not be included in ARS line pools.
Since tie lines can be connected to other AT&T phone networks such as
System 75, your authorized AT&T technician will inform you what numbers
to dial if the tie line is not directed to an attendant.
The tie line type is usually set the same for both locations connected by the
tie line.
You cannot use Recall on a tie line.
You can renumber your inward dial plan numbers to be either three or four
digits.
Dial repeating tie lines work best when your system is in the pooled mode.
Tie lines that will use Touch-Tone signaling on incoming calls require either
a basic telephone module or a four-line module with Touch-Tone receivers
within the MERLIN II system.
In a pooled system with dial repeating tie lines, incoming calls to a direct
extension will also ring at the attendant console. If you have a one-attendant
console, you may wish to set the console for delayed ring so that calls to a
direct extension will ring at that extension first. If you have one or more
attendant consoles, and do not want tie line calls to ring at the consoles, you
should set the tie line buttons on the consoles for "no ring." If direct tie line
access to each console is required, you must assign both a tie line extension
number and an extension number for regular incoming calls to each console.
The "regular" extension is accessed with a cover button. Consult your
authorized AT&T representative for information about this configuration.
Refer to the MERLIN II Communication System Installation, Administration, and
Maintenance Manual for information on setting the ring option.