363-206-305
Technical Specifications
Issue 3 June 2000
10-3
DS1PM Low-Speed (BBF3/BBF3B)
10
■
Electrical Specification
The DS1PM low-speed interface transmits and receives a standard
electrical DS1 signal as specified in ANSI T1.102-1993, Section 2 (1.544
Mb/s nominal rate, DSX-1 interconnect specification). Line coding is
provisionable to AMI with or without B8ZS. Line buildout is provisionable
as follows:
— 613C (22 gauge): 30 to 655 ft.
— 1249-C (26 gauge): 30 to 450 ft.
■
Format Specification
The DS1PM low-speed interface can be provisioned for the following DS1
formats: clear channel (default), superframe (SF) as specified in ANSI
T1.403-1989, or extended superframe (ESF) as specified in ANSI T1.403-
1989. In the case of SF or ESF format selections, DS1 performance
information is collected by monitoring the associated DS1 framing format.
■
Alarm Thresholding
The following parameters are monitored at the DS1PM interface:
— Loss of signal (LOS)
— Line coding violations (CV-L).
The alarm level for each of the monitored parameters can be provisioned to
CR, MJ, MN, or status. B8ZS and AMI coding violation failure thresholds
are user settable to 10
-3
, 10
-6
, 10
-7
, or
10
-8
BER.
■
Loopback
— Quad DS1 facility loopback (BBF3)
— Single DS1 facility loopback (BBF3B) (Release 3.0 and later).
■
Performance Monitoring (See Table 10-3 and Table 10-23.)
Near-End DS1 Path Parameters:
— Errored Seconds (ES)
— Severely Errored Second (SES)
— Unavailable Seconds (UAS)
— SF or ESF framed signals incoming to the DSX-1
— CV-P Coding Violations (Release 3.0 and later)
— CV-PFE Coding Violations (Release 3.0 and later).
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