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INSTALLATlONlNSTRUCTlONS
SECTION 200-255-204
FEBRUARY1992
FIGURE 4-38-INSTALLING DDIU-MAT
Pin No.
Designation
1
FG Protective Ground/Frame
2
SD Transmitted Data (to DDIU)
3
RD Receive Data (from DDIU)
4
RTS Request to Send (to DDIU)
5 CTS Clear to Send (from DDIU)
6 DSR Data Set Readv (from DDIU)
1 7 1 SG 1 Sianal Ground/Common Return
1
1 8 (RCDI Receive Carrier Detect (from DDIU)
1
1 15 /ST21 Transmission Signal Element Timing
(from DDIU)
I
, 7
RT Transmission Signal Element Timing
(from DDIU)
Data Terminal Ready/Equipment
2o DTR Readv (to DDIU)
I
I
<
.
22 1 Cl ) Ring Indicator (from DDIU)
5.84 The provided 2-pair modular line cord con-
nects the DDIU-MAT to the electronic telephone
line connector. The 3-pair modular line connector
connects to the 3-pair house cable run from the
LCEC/NCEC (see Digital Data Interface Unit Con-
nections, Paragraph 5.70).
5.85 Several DIP switches found on the bottom of
the DDIU-MAT must be set for proper operation
(Figure 4-39).
DIP
SWITCHES
1 1 1 NO DATA 1
1 2 1 2400 bps 1
1 3 1 4800 bps 1
1 4 / 9600 bps )
FIGURE 4-39-DDIU-MAT DIP SWITCHES
5.86 When the DATA DETECTION switch (Switch
1) is placed in the ON position, the automatic data
release feature will be activated (data connection is
automatically released if no data is transmitted for
a period of 18 minutes).
4-29
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