T1/E1 port configuration task list
188
IPLink Software Configuration Guide
16 • T1/E1 port configuration
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)
If the T1/E1 WAN-Card provides several line interface connector types the command specifies which one is
currently in use. Sure, the signal is always on all connectors available but dependent on the wiring technology
the internal impedance matching must be adapted (RJ45 = 120 Ohm; BNC = 75 Ohm).
Mode: port e1t1 <slot> <port>
Configuring T1/E1 application mode
The T1/E1 port can be configured to work in either short-haul or in long-haul mode.
Short-haul
is the default
application and should be used for transmission distances up to
180m/600ft
. For transmission distances up to
1800m/6000ft
, select the
long-haul
application.
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
Step
Command
Purpose
1
[
name
] (prt-e1t1)[
slot/port
]#application
{long-haul | short-haul}
Specifies the e1/t1 application mode
Default:
short-haul