Juniper Networks ERX-1410 - Manual (Page 143)

Connection Information
ERX Edge Routers
B-21
Cable Lengths for X.21/V.35 Cables
Serial signals can travel a limited distance without significant
degradation. Slower serial signals can travel farther without degradation
than faster serial signals.
Table B-4 shows the maximum cable lengths
you can use to prevent signal degradation at various transmission speeds.
X.21/V.35 X.21/V.35 X.21/V.35
I/O 16 200-pin proprietary
socket on I/O module
DB15 X.21 or DB34
V.35 at remote end See Table B-4 .
a.The GE SFP I/O module uses a range of simple form factor pluggable transceivers (SFPs) to support different
modes and cable lengths.
b.Assembly is superseded by a newer assembly; however, assembly is supported by current software.
Table B-3 Connection information for module assemblies (continued)
Assembly
Name and
Capability Line
Module
Label
I/O Module
Label No. of
Ports
Connector Type Cabling Specifications
Table B-4 Maximum cable lengths for X.21/V.35 connections
Transmission Speed (Hz) Cable Length (Feet) Cable Length (m)
2400 4,100 1,250
4800 2,050 625
9600 1,025 312
19200 513 156
38400 256 78
56000 102 31
2048000 25 8