Lucent Technologies MERLIN LEGEND Release 7.0 Feature Reference page 761

MERLIN LEGEND Communications System Release 7.0
Feature Reference 555-670-110
Features
Tandem Switching
Remote access settings to allow network routing
Feature interactions with line/trunk features such as pools and PRI
''Uniform Dial Plan Features'' on page 741
and used for one aspect of private networks: non-local dial plan extensions,
including the following topics:
Intersystem calling between extensions located at different systems in a
private network
Details of UDP routing for intersystem calls and other routed calls
Feature interactions across private networks
Tandem switching offers the following features and benefits:
Toll Savings. Private networked trunks allow you to realize cost savings
on long-distance and toll calls in the two following ways:
Service Cost Savings. There are two ways that organizations can save on
costs incurred from service providers:
— Callers on a local system can use ARS to reach the public switched
telephone network via outside trunks connected to networked
remote systems, decreasing the cost of toll calls. No special dialing
is required. See
Plan Routing, and Remote Access'' on page 703
— In addition, organizations can use private networked trunks to make
calls between networked systems, which may be geographically
distant from one another. For details about this functionality, see
''Uniform Dial Plan Features'' on page
— Customers order a point-to-point T1 facility from a service provider,
then use system programming to set it up for tandem PRI or tandem
T1 services. As necessary, a service provider can provide
amplification for these digital tandem trunks, but does not supply
switching services.
— Release 6.0 and later systems support fractional use of PRI and T1
facilities through drop-and-insert equipment placed between
networked systems that tandem trunks connect. This technique is
often used to provide 2B data services on the dropped channels or
B-channels, while reserving the remaining lines for voice traffic. All
T1 channels (emulated tie and Switched 56 data) and PRI
B-channels must still be programmed and all do count towards the
system maximum of 80 lines. To learn more about using and setting
up T1 and PRI tandem trunks, refer to
and T1'' on page
describes how the system is set up
''Automatic Route Selection (ARS), Uniform Dial
509.
for details.
741.
''Primary Rate Interface (PRI)
Issue 1
April 1999
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