Symmetricom TimeSource 3600, Руководство пользователя

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Installation
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S S S S S S S S S S S S S S S S S S S S S S S S S S S S S
Module for ESCIU Por ts
(990-72060-04 System Only)
The ESCIU ports (Figure 30) have a different function than the
synchronization outputs. A synchronization output provides an
all-ones reference clock signals for network elements. An ESCIU
port carries live E1 traffic, and synchronizes the live traffic as it
passes through. The ESCIU module can synchronize 2 spans in
one direction. The return direction passes through as it is.
The ESCIU ports can connect at the digital distribution frame
(DDF). The network elements receiving the ESCIU output signal
must be able to receive E1 signals that conform to CCITT G.703
paragraph 6 specifications. The network element can be
configured to extract its timing from the live E1 traffic signal.
A bypass relay directs E1 traffic around the ESCIU circuitry to
maintain span continuity if a TimeSource 3600 fault occurs.
Figure 30. Connector Layout of ESCIU Modules
OUT
IN
RTN2 IN
RTN2 OUT
SPAN 2
OUT
IN
RTN1 IN
RTN1 OUT
SPAN 1
T
R
S
RTN2
OUT
IN
T
R
S
T
R
S
T
R
S
RTN1
OUT
IN
T
R
S
T
R
S
BNC Module Wire-Wrap Module
Span 2 NE
return (not syn-
chronized)
Span 2 to NE
(synchronized)
SPAN 2 SPAN 1
IN OUT IN
OUT Span 1 NE
return (not
synchronized)
Span 1 to NE
(synchronized)
Span 2 toNE
(synchronized)
Span 2 NE
return (not
synchronized)
Span 1 NE
return (not
synchronized)
Span 1 to NE
(synchronized)