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DTI installation
Equipment overview
This chapter describes the procedures for installing and removing DTI/CPI
equipment and Clock Controllers in a variety of systems. The descriptions
include cable requirements.
The first part of the chapter provides detailed information on the DTI card. A
section on the Echo Canceller follows the DTI information. The last part of
the chapter focuses on Clock Controllers.
The DTI connects a Network loop to an external DS-1 interface for both voice
and data transmission over 24 digital channels.
The DTI interface requires a QPC472 DTI or QPC720 Primary Rate
Interface (PRI) card. Because this document deals with DTI functions, both
cards are referred to as the "DTI" card or "DTI" hardware whenever their
function is identical.
Clock Controllers synchronize the system clock rate with the clock rates of
digital switching and transmission equipment over a T1 circuit. Dual CPU
systems have two Clock Controllers: CC0 (associated with CPU 0) and CC1
(associated with CPU 1).
The standard Meridian 1 Clock Controller is the QPC471, currently available
in vintages C, D, E, F, G, and H. Option 81 must use vintage H.
Customers outside the United States can use the QPC775. Vintage A of the
QPC775 can be used with non-networked systems (systems linked directly to
a central office); vintage B is appropriate for networked systems (Meridian 1
to Meridian 1 configuration). Customers with option 81 systems must use
QPC775 vintage C.
DTI/CPI Installation and data administration
Page 3 of 66
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