Electra Elite IPK Document Revision 4
General Description Manual 3 - 11
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DTI-U( ) ETU T1/FT1 Trunk Interface
The Digital Trunk Interface ETU provides
termination of Fractional T1 (24 DS-0
channels) lines. This ETU contains
circuitry for outside ring detection,
holding, dialing, control function, Tie line
(E&M), and DID signaling.
Automatic Number Indication (ANI) is
supported.
Only the DTI-U30 ETU supports K-CCIS
common channel signaling.
A combination of Loop Start and Ground
Start trunks, DID trunks, or Tie lines can
be used on the ETU. Each trunk is
assigned in groups of four. DTMF or Dial
Pulse dialing is supported.
This ETU is installed in any slot in the
basic or expansion B64-U20 KSU.
The maximum number depends on other
trunk cards installed. This ETU shares
the total number of CO/PBX lines in the
system.
A CLKG-U( ) Unit must be installed.
4 8 Note 1, 3, 4, 5
Table 3-2 Maximum System Capacities for Trunk Interface ETUs (Continued)
Trunk Interface
ETUs
Description
Maximum Capacities
Notes
Basic Port
Package
Expanded
Port Package
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