User's Manual

Exalt Installation and Management Guide
ExtendAir
®
(TDD) Series Direct Mount
16 000000-001
2011-08-26
For example, a radio configuration of 32MHz/Mode2 with a 5ms TDD frame size supports up to
110Mbps user capacity or 55Mbps full-duplex. By selecting 80/20 on one side of the link and 20/80 on
the other side, the radio allows up to 88Mbps in one direction, and 22Mbps in the opposite direction.
T1/E1 is supported with asymmetric settings. However, based on the BW/mode setting (and in some
cases, TDD frame size and distance), the direction with the limited throughput limits the number of T1
or E1 connections obtained. For example, the 16MHz/Mode1 setting typically supports up to 27Mbps
aggregate throughput. In the 80/20 ratio configuration, one direction is limited to 5.4Mbps, which is
less than 3xE1 and less than 4xT1. Since TDM connections must be symmetrical, this setting therefore
limits throughput to no more than 2xE1 or 3xT1.
Simple Network Management Protocol (SNMP)
The Exalt radios primarily use a browser-based graphical user interface (GUI) for radio configuration
and management, as described in Exalt Graphical User Interface (GUI)
. In addition, a command line
interface (CLI) is provided for serial and/or Telnet access, as described in Configuration and
Management. SNMP is often used for management of larger networks as described here. Use SNMP to
manage networked devices and execute the following functions:
• GET: Obtain information from the device, such as a configuration setting or parameter.
• SET: Change a configuration setting on the device.
• TRAP: The device proactively informs the management station of a change of state, usually used
for critical alarms or warnings.
One feature of the SNMP implementation is that system configuration changes do not take effect using
the SET command. Instead, groups of configuration settings can be preconfigured for global change,
and a single ‘Save’ (Commit) command implements all changes.
When some parameters are changed, a link may drop and/or management control lost. MIB files allow
many parameters to be set at once, allowing only a temporarily dropped link or management control
issue. The opposite end radio can be quickly reconfigured, with little downtime for the link and
management control. The save (Commit) command is similar to the Update button.
Dropped links or management control issues do not occur with every parameter change. Many
configuration changes do not impact traffic or management access.
Exalt radios utilize SNMPv3, a high security version of SNMP, to ensure secure access to and storing
of management data. The SNMPv3 security string matches the admin and user passwords. Passwords
must be eight characters or longer. Some models also have legacy SNMP support for customers
requiring SNMPv1 and/or SNMPv2.
Note: GPS sync is supported with asymmetric settings, but in addition to the other
requirements for sync, all radios tied to sync must be set with matching ratios.
Note: MIB files can be downloaded on the File Transfer Page.