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IBM 8265: Planning and Site Preparation Guide
DS3 and E3 Line Characteristics
Table 45 summarizes the characteristics according to the type of line.
Table 45. DS3 and E3 Line Characteristics
Characteristic
DS3
E3
Fractional Support
no
Line Speed
44.736Mbps
34.368Mbps
Payload
42.209Mbps
33.920Mbps
Clock Role
DTE or DCE
Connector Type
BNC, 75
W
line impedance
BNC, 75
W
unbalanced line
impedance
Number of Line
Attachments
1 line attachment per I/O card
Physical Interfaces
DS3
ITU-T G.703
Code
B8ZS
HDB3
Frame Format
C-bit parity multiplex
ITU-G.832
Transmission
Convergence Layer
•
PLCP
•
HEC
Not applicable
Cell Payload Scrambling
•
PCLP: no
•
HEC: yes
Not applicable
Idle Cell Character
Not supported
Cell Discard Policy
ANSI, ANSI unassigned
ATM Forum, ATM Forum unassigned
CCITT, CCITT unassigned
Summary of Contents for 8265
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