Filter
Top Products
B-32
Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Appendix B Specifications
MATM Specification
Note All service specific alarms, except red, are passed through transparently.
Loss of signal (red) at CBR interface results in all 1’s cells being transmitted.
Brief periods of cell loss “Starvation” results in insertion of 47 octects of 1’s.
Extended periods of cell loss results in all 1’s (unframed AIS) being generated.
During periods of cell bus configuration SAR-PDUs are discarded.
MATM Specification
Physical Layer Interface T1:
Physical Interface (T3.T1) RJ48-T3T1-LM
• T1 Line Interface Connector: Miniature RJ-48C, 100 ohms balanced
• T3 Line Interface Connector: BNC, 75 ohms unbalanced
Physical Interface (E3.E1) RJ48-E3E1-LM:
• E1 Line Interface Connector: Miniature RJ-48C, 100 ohms balanced
• E3 Line Interface connector: BNC, 75 ohms unbalanced
Physical Interface (E3.E1B)
SMB-E3E1-LM:
• E1 Line Interface Connector: Miniature SMB, 75 ohms unbalanced
• E3 Line Interface Connector: Miniature SMB, 75 ohms unbalanced
Line Rate: 1.544 Mbps ± 50 bps
IMATM Synchronization: Digital PLL to synchronize all transmitters to one of the
following: the T3 line, any of the T1 lines, or the MGX 8220
shelf 8 kHz clock
Line Code: Bipolar 8 zero substitution (B8ZS) as specified in ANSI
T1.408
Line Framing: Extended Superframe Format (ESF 24 frame multiframe) as
in ANSI T1.408