User's Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
SEPTEMBER 1999
SECTION 3: INSTALLATION & ADJUSTMENTS PAGE 3-51
3.14.3.3 TBOS Protocol and Map
The diagnostics port is configured for an open industry standard protocol, called Telemetry Byte
Oriented Serial (TBOS). TBOS is a poll and response protocol that operates on a RS-422 4-wire
interface, one pair for transmit data (requests) to the radio, and one pair for receive data (responses)
from the radio. TBOS is asynchronous, serial, half duplex transmissions of ASCII words which
consist of one start bit, 8 data bits, odd parity and two stop bits at 1200 baud. The connected
terminal (remote or local) can poll the radio and determine status of the connected LYNX.sc radio.
The LYNX.sc is also able to communicate TBOS commands over the RS-232 connections, instead
of the RS-422 connections if desired.
TBOS operates with a bit-map structure where each bit that the connected LYNX.sc radio sends to
the TBOS terminal has a specific meaning with regard to status, alarms or controls. All TBOS
network elements require a map for the network management software to interpret their responses
to queries from the terminal. Table 3-F provides the TBOS map for the E1 LYNX.sc radios.
The near-end RSL and Tx power test point voltages are encoded as 8 bit words that can be
converted into reference voltages (the same as at the front panel of the radio.
The address of the radio (see Section 3.14.1) serves as the “display” page number for the TBOS
data. Since TBOS is limited to eight (8) displays of data, it is required that addresses of 01 through
08 be used for LYNX.sc radios in TBOS networks. Any radio with addresses other than 01 through
08 will not report to the TBOS bit-map. In order to view status displays of far-end radios, or other
radios in the connected network, the AUX DATA port must be in Bridge (default) mode as described
in Section 3.14.4.
Alarm points within the TBOS map behave like the radio front and
rear panel alarms. If DIP switches have been set to disable
alarms, the alarms are disabled within the TBOS map.