User's Manual

Exalt Communications, Inc.
Exalt i-Series Installation and Management Guide
5000001 83
2007-04-15
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.
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. For ‘-16’models, the highest number channels
that are configurable (based on the currently installed license key) are
disabled if they cannot be supported with the current settings.
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
on page 85).