May 2001
System Hardware Manual 5 - 123
A6-324000-642-01 – Release 4.0
May 2001
S
ECTION
4
I
NTERFACE
ETU
S
The Electronic Telephone Units described in this section provide a link
between equipment in the Xen system and outside equipment. All ETUs are
installed in the interface slots of the KSU.
4.1 BRT(4)-U13 ETU
4.1.1 Description
The Basic Rate Trunk Interface (BRT) ETU terminates
ISDN Basic Rate Trunk lines complying to the ETSI
standard. This unit supports four ISDN-BRI trunks, and
each trunk supports two channels. These eight channels
can be used for CO trunks with DTMF signalling.
The BRT(4)-U13 ETU uses an S/T-type interface and
connects to the Network Termination unit (NT1) provided
by the Telco.
Each BRI interface must be of point-to-multipoint type.
4.1.2 Installation
A maximum of 8 BRT(4)-U13 ETUs can be installed in the
Xen Master system, in slots S1~S4 in the first or second
KSU.
Figure 5-15 BRT(4)-U13 ETU
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