User's Manual

Exalt Installation and Management Guide
EX-i Series GigE (FDD) Digital Microwave Radios
54 202675-008
2016-06-01
T1/E1 Configuration Pages
These pages allow the administrator to selectively configure the T1 or E1 circuits, one at a time. For
enabled T1/E1 circuits, additional configuration, including loopback functions, are available. Disable
the unused T1 or E1 so that the alarms are turned off and more throughput is allocated to the Ethernet
interface. Every enabled T1 or E1 input, even if there is no T1 or E1 signal present, reduces the
aggregate throughput of the Ethernet interface by roughly 3Mbps (for T1) or 4Mbps (for E1).
Click the Set to T1 or Set to E1 button to toggle the page between T1 and E1. This will interrupt traffic.
T1/E1 mode self-coordinates across the link if the link is active. This means that it only needs to be set
while connected at one end. In addition, enabling and disabling T1/E1 circuits also self-coordinates
across the link if the link is active. If a link is not active and T1/E1 enabling is a mismatch when a link
is first created, the Tx-Low radio for T1/E1 enabling supersedes the settings on the Tx-High
configuration, and changes the settings on Tx-High.
T1 Interface Configuration Page
This page allows the administrator to enable/disable the alarm for each individual T1 channel, set the
Line Build Out (LBO), Line Code (either AMI or B8ZS), and AIS enabling/disabling for each input. If
enabled, the radio places an AIS code on the output of the associated interface if and when the link
fails or when there is no T1 signal available from the far end to provide the user at the local end.
Loopback controls are also provided (see
Loopback).
Carefully consider alarm enabling relative to the number of ports allocated (see
Allocation Page) and
their relative priority (see
Cross Connect (X Connect) Page).
If alarms are enabled, a red alarm occurs when a port is allocated and no T1 signal is detected. A
yellow alarm occurs s when a port is not allocated and a T1 signal is detected. Disable alarms for
unallocated ports or ports with traffic connected but that are not in use.
Note: Certain combinations of the Mode/Modulation and Bandwidth parameter settings limit
the number of T1/E1 circuits that can be carried by the radio. In these cases, certain fields on
the T1/E1 Interface Configuration pages are not available, starting with the highest port
number. For example, for a 4x T1/E1 radio version, if only three (3) circuits can be carried,
port 4 is not viable for configuration and is disabled. If only two circuits can be carried, both
ports 3 and 4 are not available. Increasing the Mode/Modulation parameter and/or increasing
the Bandwidth parameter results in an increase in the supported number of T1/E1 circuits This
is because the T1/E1 traffic is given priority over Ethernet traffic.