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Plexus 9000 Planning and Engineering Guide
System Overview
Section 130-110-000
Issue 6, May 14, 2004
Telica, Inc.
3-25
3.5 Network
Applications
3.5.1 Tandem
Switching
The Telica Plexus 9000 supports both local (sector) tandem factions and
access tandem functions
.
Besides supporting over 80,000 protected DS0
ports, the local tandem provides robust alternate routing and substantial
economic benefits through interconnecting subtending offices (i.e., Class 5
switches). The Plexus access tandem features support Equal Access
signaling for connection to domestic IXCs and international carriers.
In addition to TDM tandem, the following applications are supported by
the Plexus 9000:
•
Full switch PRI offload or Internet call diversion
•
Two-way PRI
•
Two-way DTMF CAS
•
Voice over IP (VoIP)
•
Voice Trunking over ATM (VToA)
3.5.1.1
PRI Offload or Internet Call Diversion
In the PRI offload application, the Plexus 9000 terminates a large number
of IMTs bound for various ISP destinations, and switches each inbound
call to the appropriate ISP's PRI. To the network, the Plexus 9000 appears
exactly as a full class 5 or 4 switch. The IMTs bound for ISPs are
terminated directly to the Plexus 9000, thus offloading all ISP traffic from
the class 5 and 4 switches to the Plexus 9000. The Plexus 9000 terminates
these services at 10% of the expense of existing switch architectures.
3.5.1.2 Two-way
PRI
The Plexus 9000 switch also allows calls to be originated over Primary
Rate Access lines and be terminated by the Plexus. A subscriber can
originate a PRI call through the Plexus that can switch and route it to
another PRI user connected to the Plexus or to an IMT to a remote user.
3.5.1.3 Two-Way
CAS
The Plexus 9000 may be configured to support Class 5 end office
applications featuring CAS line terminations. Both DTMF and dial-pulse
signaling are supported, along with most popular line supervision
methods. The same TDM IOM is used for PRI or CAS terminations as
well as IMT applications. The shelf must be fitted with one or two (for
redundancy) voice processing modules required for tone detection. CAS
support is also available for MF trunk interfaces.