User's Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
SEPTEMBER 1999
SECTION 3: INSTALLATION & ADJUSTMENTS PAGE 3-53
3.14.4 AUX DATA (Digital Service Channel) Connection
The AUX DATA port is a separate wayside serial port which can be configured to allow the
connection of any user serial data (to 9600 baud) through the radio network. In the default
configuration, this service channel is “bridged” to the diagnostics port, providing TBOS network
management for far-end radios including radio network management through repeaters and hubs.
Connection to the AUX DATA port is an RS-232 or RS-422 serial interface, identical to the
diagnostics port (see Section 3.14.3). This port does not affect the E1 traffic on the LYNX.sc radio.
For TBOS network management, or when the AUX DATA port is used as a clear service channel,
co-located radios can be wired to one another to provide the information throughout the network. At
a repeater or hub location, bridging is accomplished by cable connections between co-located
LYNX.sc radios, via their AUX DATA ports, as shown in Figure 3-25 and 3-26. Figure 3-27 illustrates
the pin-to-pin connections for this configuration. There is a related DIP switch position, as shown in
Figure 3-27, that makes the AUX DATA port usable for customer data instead of the TBOS network
management information. The factory default setting for this DIP switch is for TBOS network
management.
For non-TBOS external site management systems can be used with the LYNX.sc radios; Figure 3-
26 shows a typical application. Here the reporting relies on external devices to communicate over
the clear service channel of the LYNX.sc radio. Each radio is given a site location (see Section
3.14.1) and information on the radio status and control is fed through the diagnostic port to a remote
terminal unit (RTU). These RTUs have the capability of providing for other external inputs at the
remote site, for complete network management. Communication from each RTU is fed via the RS-
232 port to the AUX DATA connector on the radio, in this configuration no bridging is required.
RTUs that do not support TBOS can alternatively connect to the
LYNX.sc alarm connector for discreet TTL alarms and/or test
point voltages.
If you are using TBOS network management and want full
information on the far-end radio (even in a single-hop
application), the bridge function must be enabled.
The service channel can only be used for TBOS network
management or for Aux data, not both. When selected for
TBOS, no other data should be connected to the AUX DATA
port.