Vertical SUMMIT IP
Hardware Description and Installation Manual
Issue 1.2
26
4.5 EKSU Expansion Main Board Unit (EMBU)
Description
The EKSU houses the EMBU, which is shown in Figure 4.6-1 and controls communication
between the EKSU and the installed optional Interface boards and the KSU that controls
the interfaces.
The EKSU has four (4) CO line and eight (8) Hybrid interface ports. The CO line ports
support loop start CO lines with detection of supervisory signals including Caller
Identification (CID), Polarity Reversal (PR), and Call Progress Tone (CPT).
The SLT interface of the Hybrid ports support FSK (ITU-T V.23 or Bell 202) or DTMF (ITU-
T Q.23) Caller ID and the Message Wait Indication (MWI), DTMF detection, sinusoidal
ringing generator, -48V DC feeding voltage, current limiting and GR-909 Line Testing
function.
As shown in the figure, the EMBU has connector CN1 for the various Interface boards and
connectors, and CN8 and CN9 for installation of the Call metering CO Line daughter board
for the built-in CO lines. A maximum of two (2) Interface boards can be installed with the
first board mounted on the CN1 connector of the EMBU and the second mounted on the
pass-through connector on the first board. Interface boards available for the EMBU include:
CH204 - CO Line & Hybrid board, 2 CO & 4 Hybrid ports
CH408 - CO Line & Hybrid board, 4 CO & 8 Hybrid ports
CD408 – CO Line and Digital telephone board, 4 CO & 8 DKT ports
HYB8 - Hybrid board, 8 Hybrid ports
CS416 - CO Line & SLT Board, 4 CO & 16 SLT ports
DTIB8 – Digital telephone board, 8 DKT ports
SLB16 - SLT board, 16 SLT ports
Figure 4.5-1 EMBU
