Specifications

CHAPTER
5-1
Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
5
Cisco IGX 8400 Series Lines
This chapter provides information on configuring and managing lines.
For information about the BPX, see Chapter 1, “The BPX Switch: Functional Overview,” in the
Cisco BPX 8600 Series Installation and Configuration guide.
Functional Overview
A line is an nxT1, nxE1, T1, T3, E1, E3, or OC3 circuit that carries data, voice, FR or ATM traffic
between an IGX node and customer premises equipment (CPE). Each CPE is attached to a node through
a circuit line.
See Table 5-1 for the input line formats supported by the IGX. For more information on these line
formats, see Appendix A, “General IGX 8410 Switch Specifications” in the Cisco IGX 8400 Series
Installation Guide. For more information on the features and types of service supported by each module,
see Chapter 2, “Cisco IGX 8400 Series Cards”
IMA on the IGX
IMA groups physical T1 or E1 lines to form logical lines with a higher data rate than a single T1 or E1
line. IMA on the IGX allows you to use the same configuration for all physical lines making up the IMA
line group, and provides full support for individual physical line alarms and statistics.
Table 5-1 Input Line Formats Supported on the IGX
Type Electrical Signal Format Ones Density Enforcement Multiplexing Supported On
J1 Coded mark inversion (CMI) – 31 channels at
64 kbps each
CVM
E1 Alternate mark inversion (AMI) High density bipolar 3
(HDB3)
31 channels at
64 kbps each
CVM, UFM,
UXM, UXM-E
T1 Alternate mark inversion (AMI) Bipolar zero substitution
(B8ZS)
24 channels at
64 kbps each
CVM, UFM,
UXM, UXM-E
E3 Physical layer convergence protocol per AT&T
publication; ITU I-361 with HEC for E3
HDB3 ITU-T G.804,
G.832
UXM, UXM-E
T3 Physical layer convergence protocol per AT&T
publication TA-TSY-00772 and 000773 for T3
B32ZS+ – UXM, UXM-E