User's Manual

Table Of Contents
Exalt Installation and Management Guide
EX-i Series (TDD) Digital Microwave Radios
62 206501-019
2016-05-24
T1/E1 Configuration Pages
These pages allow the administrator to selectively enable or disable 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).
This page toggles between T1 and E1, as required, by clicking the Set to T1 or Set to E1 button. A
warning displays that a reboot is necessary, and the radio reboots if the administrator continues. This
will interrupt traffic. It may be necessary to re-login to the radio after the reboot completes. 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 Radio A configuration for T1/E1 enabling supersedes the settings on the Radio B
configuration, and changes the settings on Radio B.
T1 Interface Configuration Page
This page allows the administrator to enable/disable 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 T1/E1 Loopback
).
Note: Certain combinations of the TDD Frame Size, Link Distance, Mode, 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 available for configuration and is disabled. If only two circuits can be
carried, both ports 3 and 4 are not available. Increasing the TDD frame size and Mode
parameters, and/or increasing the Bandwidth parameter results in an increase in the supported
number of T1/E1 circuits.