TTC T-BERD 107A, Reference Manual

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SECTION 3
3-55
INSTRUMENT
DESCRIPTION
3.19 FRACTIONAL T1 (FT1) OPTION
— INTRODUCTION
The Fractional T1 (FT1) Option (107A-5) pro-
vides fractional T1 modes for contiguous and
noncontiguous, 56KxN and 64KxN, FT1 testing
capabilities in D4, and ESF framing formats.
It also provides three FT1 stress patterns (63,
511, and 2047) for testing DDS and fractional T1
circuits.The FT1 Option replaces the 1000 Hz pattern
with four VF tones for insertion on single DS0
channels within the DS1 signal.
NOTE:
Unless indicated, the capabilities of the
mainframe are applicable to the FT1 Option.
3.20 FRACTIONAL T1 (FT1) OPTION
— TEST SETUP
MODE Switch
In addition to the mainframe operating modes, the
following FT1 operating modes are also available:
FT1 D4 — D4 Superframe Fractional T1 mode
configures the T-BERD 107A to transmit and
receive D4 framed FT1 data. The FT1 D4 mode
is compatible with the D4 superframe format.
FT1 ESF — Extended Superframe Fractional
T1 mode configures the T-BERD 107A to trans-
mit and receive ESF framed FT1 data.