Table 46. T1, E1, And J1 Line Characteristics - IBM 8265 Site Preparation Manual

T1, E1, and J1 Line Characteristics

Table 46. T1, E1, and J1 Line Characteristics

Characteristic
Fractional Support
Line Speed
Payload
Clock Extraction
Connector Type
Number of Line
Attachments
Physical Interfaces
Code
Frame Format
Alarm
Table 46 summarizes the characteristics according to the type of line.
T1
1.544Mbps
Clear channel:
1.536Mbps
Yes
RJ48C/CA48C
DB15/CA31A
Interface type:
•
DS1
•
DSX1
(maximum length of
cable to DSU-end
110 ft.)
Standards
•
AT&T 62411
•
ANSI T1.403
•
EIA IA.547
B8ZS
AMI
D4 (SF), D5 (ESF) for:
•
T1.403
•
T1.407
•
AT&T 62411.
T1.M1
AT&T 62411
E1
no
2.048Mbps
Clear channel:
1.920 or 1.984Mbps
Yes
Coaxial:
9
•
BNC, 75 line
impedance
Twisted-Pair:
•
Open wires, 120
line impedance
Up to 4 line attachments per I/O card
ITU-T G.703
HBD3
•
ITU-T G.703
unstructured
•
ITU-T G.704 with or
without CRC
•
ITU-T G.706 support
for frame alignment /
CRC procedure
ITU-T G.703
Chapter 7. Planning for Media Modules
J1
1.544Mbps
Clear channel:
1.536Mbps
No
ISO IS8877
9
Interface type:
•
NTT
•
DS1
•
DSX1
(maximum length of
cable to DSU-end
110 ft.)
Standards
•
JT-I411a
•
JT-I431a
•
ANSI T1.403
•
NTT HSDLCS
B8ZS
NTT-I interface format
ITU-T G.732
69