Verilink PRISM 41TDM (34-00275.4) Product Manual - Manual (Page 49)

Configuration 41
Far RTS - This option adds tracking of the far-end’s RTS lead to the existing
Idle>Off capability. DCD is On except when the unit is receiving an OOS, or OOF
code or an LOS. It is also Off when the far-end unit’s RTS is inactive.
For tracking to occur, set the unit’s Mode to TXP I or TXP-II and RTS to Normal.
RTS
Request To Send is an input to the unit from the DTE. Clear To Send is an output
from the unit to the DTE. The behavior of RTS and CTS is set as follows. In the
Normal setting, the unit reacts to RTS from the DTE. When RTS is On, the unit
transmits data normally and turns CTS On (depending on the Circuit Assurance
setting and after the delay set by the RTS/CTS Delay option). When RTS is Off,
the unit transmits idle code to the network and turns CTS Off. In the Forced On
setting, the unit ignores the state of the RTS lead from the DTE and forces it On
internally and forces CTS On.
RTS is ignored when in the TDM mode.
RTS/CTS Delay
This option allows choosing the delay on the RTS to CTS change. When RTS
Control is set to Normal, CTS follows the state of RTS after some delay depending
on the data rate and the setting of this field. This delay can be Normal or LONG as
shown in Table 4-6.
DTR Alarm
Selecting Enable allows the unit to alarm on loss of DTR. This occurs when the
DTE port sees that the DTR signal is low. The default setting is Disable.
V.54 Loop
Selecting Enable allows the unit to respond to inband V.54 loop commands. If
Disable is selected, the unit ignores these commands.
LL Enable
This option allows enabling or disabling the local loop activation by the local
loopback signal (EIA-530 or RS-232 pin 18) on the DTE interface.
RL Enable
This option allows enabling or disabling the remote loop activation by the remote
loopback signal (EIA-530 or RS-232 pin 21) on the DTE interface. Remote
loopback causes transmission of V.54 loop or unloop codes to the far-end device.
Alarm Configuration The Alarm Configuration screen (Figure 4-9) allows reviewing and setting alarm
related thresholds for the selected element. These thresholds are the minimum
Table 4-6 RTS/CTS Delay Options
DDS Rate (kbps) Normal Option Long Option
56 0.4
±
0.02 ms 0.8
±
0.04 ms
64 0.3
±
0.015 ms 0.6
±
0.03 ms
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