363-206-285
Technical Specifications
10-14 Issue 3 June 2001
EC-1 High-Speed and Low-Speed (BBG6) 10
â– Electrical Specification
The EC-1 high-speed and low-speed interface transmits and receives a
standard electrical EC-1 signal as specified in
ANSI
T1.102-1993 (51.844
Mb/s rate, STSX-1 interconnect specification, bipolar 3-zero substitution
([B3ZS] encoded and scrambled).
Line buildout is provisionable as follows:
— 734A/D: 0 to 450 ft.
— 735A: 0 to 250 ft.
â– Format Specification
The EC-1 high-speed port interfaces with an EC-1 signal compatible with
the electrical STS-1 interface specification in
ANSI
T1.102 and containing a
VT1.5 structured STS-1 with an asynchronous DS1 mapping. The EC-1
high-speed interface provides both line and STS-1 path termination
functions.
The EC-1 low-speed interface provides clear channel transport of any
STS-1 signal compatible with the electrical STS-1 interface specification in
ANSI
T1.102. The EC-1 low-speed port can be provisioned to provide the
path termination functions for a VT1.5 structured STS-1 with an
asynchronous DS1 mapping.
â– Alarm Thresholding
The following parameters are monitored at the EC-1 interface to the
STSX-1:
— Loss of signal (LOS)
— Loss of frame (LOF)
— Loss of pointer (LOP)
— Line alarm indication signal (AIS)
— B2 thresholding signal fail
— B2 thresholding signal degrade.
The alarm level for each of the monitored parameters can be provisioned for
CR, MJ, MN, or status. B2 signal degrade thresholds are user settable in the
range from 10
-6
to 10
-9
BER.
â– Performance Monitoring (see Table 10-23)
— EC-1 line performance monitoring.
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