T1/E1 port configuration task list
63
IPLink 2800 Series Getting Started Guide
5 • T1/E1 port configuration
Configuring T1/E1 framing
Four framing formats are available for selection on the T1/E1 port. Unframed can only be used if the encapsu-
lation is set for hdlc. All other currently available upper layer (encapsulation) protocols do not run in unframed
mode, but in one of the framed modes.
In structured mode, E1 can be configured for crc4 or non-crc4. T1 has a single framed option, esf.
The advantage of the unframed mode (obviously with hdlc encapsulation) is the utilization of the whole link
speed for user data transmission, 2.048MBit/s for E1 and 1.544MBit/s for T1. However note that HDLC has
its own overhead which decreases the actual data rate.
Mode: port e1t1 <slot> <port>
Configuring T1/E1 line-build-out (T1 only)
The line build out configuration is used in long haul applications to prevent cross talk in the far end device.
Mode: port e1t1 <slot> <port>
Configuring T1/E1 used-connector (E1 only)
The E1 WAN port provides several line interface connector types, RJ-48C and dual coaxial BNC connectors.
This command specifies which one is currently in use. Though the signal is always on all available connectors,
the internal impedance matching must be selected for the appropriate interface (RJ-48C = 120 Ohm; BNC =
75 Ohm).
Mode: port e1t1 <slot> <port>
Step
Command
Purpose
1
[
name
] (prt-e1t1)[
slot/port
]# framing
{crc4 | non-crc4 | esf | unframed}
Configures the framing of the port.
E1 mode formats are:
crc4, non-crc4, unframed.
T1 mode formats are:
esf, unframed.
Default for
e1
:
crc4
Default for
t1
:
esf
Step
Command
Purpose
1
[
name
] (prt-e1t1)[
slot/port
]# line-build-
out {0 | -7.5 | -15 | -22.5}
Specifies the pulse attenuation in dB on the line inter-
face. Default for t1:
0 dB
Step
Command
Purpose
1
[
name
] (prt-e1t1)[
slot/port
]# used-con-
nector {bnc | rj45}
Specifies the currently used connector.
Default for e1:
rj45
Summary of Contents for IPLink 2821
Page 4: ...Summary Table of Contents IPLink 2800 Series Getting Started Guide 4...
Page 18: ...About this guide IPLink 2800 Series Getting Started Guide 18...
Page 114: ...114 Chapter 9 LEDs status and monitoring Chapter contents Status LEDs 121...
Page 134: ...134 Appendix E IPLink 2800 Series factory configuration Chapter contents Introduction 142...
Page 136: ...136 Appendix F Installation checklist Chapter contents Introduction 144...