Verilink PRISM 41TDM (34-00275.4) Product Manual - Manual (Page 26)

18 C HAPTER 3: F RONT P ANEL I NTERFACE
to Internal, the internal oscillator’s frequency standard (25 ppm) is used for all
timing. Internal is only available in DDS-I and TXP-I modes.
Circuit Assurance This option allows the CTS control lead to respond to the data signal from the
network. When set to On, the unit turns off the CTS lead when receiving idle code
(for example, if DCD is Off). When set to Off, the CTS control lead is not affected
by data signals from the network. Circuit assurance is only available in DDS-I
mode.
Anti-Streaming
Timer
This timer is used to prevent a streaming DTE, on a tributary DSU in a multi-point
circuit, from locking up the circuit. If the RTS lead from the DTE stays constantly
active for the anti-streaming time, the PRISM 41TDM shuts off data transmission
into the network. Whenever RTS goes inactive, the anti-streaming timer is reset.
The timer can be turned Off (---) or set for 10, 30, or 60 seconds.
Alarm Thresholds The PRISM 41TDM can generate an alarm condition based on a specific level of
performance degradation. Alarm thresholds can be set for periods of 1, 2, 3, 4, 5,
10, 20, and 30 consecutive seconds for the OOS, OOF, FDL, and LOS parameters.
A field set to [---] causes the unit not to alarm on that statistic. To disable alarm
reporting, set all fields to [---].
OOS
Sets the Out of Service seconds threshold. This occurs when the OOS code is
received from the DDS network.
LOS
Sets the Loss of Signal seconds threshold. This occurs when a valid DDS line is
not plugged into the unit.
OOF
Sets the Out of Frame seconds threshold. This occurs on receipt of OOF code from
the DDS network.
FDL
Sets the Facility Data Link seconds threshold. This alarm occurs only in TXP-I
and TXP-II modes.
ART
Sets the alarm reset timer. The setting determines when the Alarm
Indication/Contacts are cleared after the last error. The choices are 0, 10, 30, 60,
90, 100, 200, 300, 400, 500, 600, 700, 800, and 900 seconds.
DTE Port
Parameters The DTE Port Configuration screen allows setting the operating parameters for
Port A and/or Port B. It is important to configure the DTE ports identically at
opposite ends of a link. If Port A of one unit is configured for asynchronus 19.2
kbps, then Port A at the far end must also be configured for asynchronus 19.2
kbps. Neglecting to do this inhibits the ability to pass DTE traffic from end-to-end.
It is also possible that data intended for one port (Port A) might come out the