User Manual

INSTALLATION AND MAINTENANCE MANUAL
LYNX.sc E1 FAMILY
SPREAD SPECTRUM RADIOS
OCTOBER 1998
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.