Paradise Datacom P300 Series Installation & Operating Handbook page 217

Text on Display
TX TRAFFIC FAULTS
(Top line of display)
Tx Warn: Reconfiguring Tx path
Tx Fault: <line> off, terr <DTE/DCE> not
ready
Tx Fault: <line> off, nothing to send
Tx Fault: No clock from interface
Tx Fault: Data input is all ones (AIS)
Tx Fault: No Incoming Octet Timing
Tx Fault: Frame sync lost on Tx input
Tx Fault: TS16 MF sync lost on Tx input
P300H
Description / Cause / Notes
Tx Traffic Faults: Tx OK LED Off and Tx Traffic (prompt) relay.
The modem is reconfiguring the Tx path (after a user parameter change).
<line> depends on the interface in use (eg RS422 DCE="TR", V.35="DTR"). This is a DC control
line which is used to indicate the terrestrial equipment is functioning properly. The <line> switching
off may be user set to cause this fault or be ignored (Change, Terr-Int, Control Lines).See note 5.
<line> depends on the interface in use (eg RS422 DCE="RS", V.35="RTS"). This is a handshake
line which is used to indicate the terrestrial equipment has data to send. The <line> switching off
may be user set to cause this fault or be ignored (Change, Terr-Int, Control Lines). The Modem can
be set to mute the Tx carrier if this line is off (Change, Tx, Mod, Carrier). If carrier is set to mute
when this line is off but this line is set to ignore, then there is no alarm when this line mutes the
carrier. See note 5
The modem is set to use the "Tx Clock In" (Change, Tx, Clocking), but no clock is being provided.
The clock generation will use the internal clock as a backup to maintain the carrier and any
framing/ESC integrity. Check the data connector is attached and for activity on the clock input lines
The data supplied to the modem is all ones (AIS). This is normally used to indicate an upstream
equipment fault, it is not a modem fault. See note 4
This message is only displayed if a 64kbps G.703 card is fitted. It indicates the card has detected
that there is no incoming octet timing on the G.703 signal. The monitoring of this octet timing may be
enabled and disabled with Change, Terr-Int, Card Specific.
The modem only detects frame sync when the Drop mux is active (or 2048k IBS G.732 0% overhead
mode is enabled). Check the bearer type is specified correctly (Change, Tx, Baseband, Drop). This
normally only occurs if either there are significant errors on the terrestrial link, or if it is supplied with
AIS and the modem is set to ignore AIS. Check that the AIS detector is not disabled with Change,
User-Opt, Operation, Actions, AIS. ALSO there is an option to make the modem re-seek frame sync
if CRC sync is lost (Change, User-Opt, Operation, Terrestrial, PCM Bearer CRC, CRC/Frame Acq').
Check the modem is not set to expect a CRC and forcing frame re-acquisition if CRC is lost, but
there is no CRC on the PCM signal.
The modem only seeks TS16 Multiframe sync when the Tx baseband is set to use the Drop mux in a
G.732 mode and CAS signalling has been selected (or 2048k IBS G.732 0% overhead mode with
CAS is enabled). Check that a CAS multiframe is present on the PCM signal applied to the modem
(ie terrestrial TS16 contains the 16 frame multiframe sequence).
P300 Series Installation and Operating Handbook
Relays To Terr To Sat Other
T TF
Opt Opt
T CM
Opt
TF
T TB SA,SC TF
T TB SA ,
Opt Opt Opt
SC
Opt
T
Opt
T TB SA,SC
T (TB/TE) SC
Note 1
Page 217
Opt