NEC ELECTRA ELITE IPK II - Dti-U40 Etu; Description

Electra Elite IPK II Document Revision 3
System Hardware Manual 6 - 49
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5.9 DTI-U40 ETU
5.9.1 Description
The DTI-U40 ETU is a Digital Trunk ETU that terminates FT1 trunks
(up to 24 DS-0 channels). This ETU supports K-CCIS, ANI/DNIS
trunks, and CSU Less Function on T1. On-site firmware upgrade is
supported.
A combination of Loop Start and Ground Start signaling can be used
on the DTI-U40 ETU. Dial Pulse dialing, DTMF, Tie line (E&M) and
DID are supported. The DTI-U40 ETU has 24 built-in DTMF
detectors. Trunks are assigned in groups of four.
When channels are assigned to ANI, the DTI-U40 ETU supports
Feature Group D. The DTI-U40 ETU also supports Feature Group D
incoming MF/outgoing DTMF signaling.
The DTI-U40 ETU supports the K-CCIS common channel signaling
feature with point-to-point E&M Tie lines.
The Integrated Service Digital Network (ISDN) – Primary Rate
Interface (PRI) is a public switched Telephone Network (PSTN)
service that provides 23 B channels and one D (23+D) channel for
voice call trunking. The B channels provide 23 CO/DID connections.
Figure 6-26 DTI-U40 ETU