B-14
APX 1000™ Getting Started Guide
Slot Card Specifications
DS3-ATM2 card
DS3-ATM2 technical specifications
Table B-16 describes DS3-ATM2 specifications.
YEL (Yellow)
DS3 interface has detected a Far End Receive Failure indication
transmitted from the other side.
AIS (Yellow)
Card is receiving an Alarm Indication signal (AIS).
Table B-15.DS3-ATM2 card status indicators (continued)
Status indicator
Meaning when ON
Table B-16. DS3-ATM2 card specifications
Category
Specification
Agency approvals
Electromagnetic Emissions Certifications: FCC Part 15
Class A, CISPR Class A
Interface standards
ITU G.703
ANSI T1.102
Other standards supported
ANSI T1E1.1/94-002R1
ANSI T1.107
ANSI T1.107a
ANSI T1.403
ATM Forum UNI 3.0/3.1
Bellcore TR-NWT 001112
Bellcore TR-TSY-000499
Bellcore TR-NWT-000820
ITU G.804
RFC 1407
TR54014 (AT&T ACCUNET T45 and T45R)
Physical interfaces
Four (two active, two standby) ATM UNI 3.0/3.1 cell-bearing
DS3 ports supporting C-bit/M-framing, Physical Layer
Convergence Protocol (PLCP) per TR-TSY-000773, and
direct cell mapping per G.804
BNC connector per ANSI T1.404
Electrical standards
DSX-3 per ANSI T1.404
Line build out
0 to 225 feet (0 to 68.58m), or 226 to 450 feet (68.88 to
137.16m)
Receive equalization
Based on cable length and transmitter
Line code
Bipolar 3-zero substitution (B3ZS)
Line rate
44.736Mbps ± 20ppm
Frame format
Per ANSI T1.107a (C-bit parity)
Alarm signaling
On a DS3 Red alarm, a Yellow signal is sent on the DS3 line
and an Alarm Indication signal (AIS) is sent on DS2 lines.
On a DS2 Red alarm, an AIS is sent on DS1 lines.
Connectors
75-ohm BNC coaxial