Digital Link DL600E, Руководство пользователя

Страница: 126 / 147

B-4 DL600E E1 Data Multiplexer UserÕs Guide
The pin assignments for Equipment to DL600E unit in Table B-4.
a. The data port can be programmed to recognize the Loss of DTE condition as either loss of RTS signal, loss of DTR signal or
neither (the condition is never recognized). The hardware also supports the detection of all zero condition from the DTE which
could be used to indicate a loss of DTE but currently not supported.
b. SCTE has two possible uses: a timing source to clock in the SD signal and an external timing source to be used as network
transmit timing reference.
Table B-4 Equipment to DL600E Pin Assignments
Name V.35 EIA-530 X.21 RS449 Description
Send Data SD A, B
(P,S)
T D-A, B
(2, 14)
Transmit
(2, 9)
SD A, B
(4, 22)
Data stream from
DTE
to network
Data Terminal
Ready DTR
(H)
DTE READY
(20, 23)
RT A, B
(12, 30)
Can be used to indicate loss of
DTE
signal.
a
Request to
Send RTS
(C)
RTS
(4, 19)
Request To
Send
(3, 10)
RS A, B
(7, 25)
Affects assertion of
CTS
and sending
of Blue Alarm. See diagrams. See
note 2.
Local Test/
Local Loop LT
(K)
LL
(18)
LL
(10)
When line is asserted by
DTE
, unit
enters fractional
DTE
Loopback test
and remains in test for as long as
signal is held active.
Send Clk
Transmit Echo SCTE A, B
(U, W)
TT-A, B
(24, 11)
TT A, B
(17, 35)
b
Ground
Signal Ground SG(B) SG(7) SG(19)
Frame Ground A 1 1 Connected only at
DTE
side
ONE OFF MARK V A
( )
VB
)
orV A
( )
0
< < º º º
ZERO ON SPACE V A
( )
V B
( )
or V A
( )
0
> > > º º º