Verilink PRISM 41TDM (34-00275.4) Product Manual - Manual (Page 29)

DTE Port Parameters 21
(depending on the setting of Circuit Assurance 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 to Off. When set to Force On, the unit ignores the state of
the RTS lead from the DTE and forces it on internally and forces CTS to On. RTS
is ignored when in the unit is in the TDM mode.
RTS/CTS Delay
This option allows choosing the delay on the RTS to CTS transition. 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
with the times shown in Table 3-4.
DTR Alarm
Selecting Enable allows the unit to go into alarm on a loss of DTR. This occurs
when the DTE port detects a low DTR signal.
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 Detect
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 Detect
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.
DBU Configuration The PRISM 41TDM offers an internal ISDN terminal adapter through a 6-pin
modular connector as an alternate data path in cases where the DDS network
connection fails. The DBU function has the following states:
Dial Backup Idle - Status that is retrievable to show that this port is not active.
Dial Backup Active - An alarm message is sent when the dial backup becomes
active, thus showing that the main data path is down.
Dial Backup Failed - An alarm message is sent when the dial backup link fails to
connect or there is a loss of carrier. The unit continues attempting a DBU link.
Pressing the Select button on the Dial Back Up field opens the following
submenus.
Table 3-4 RTS/CTS Delays
DDS Rate Normal Long
56 kbps 0.4
±
0.02 ms 0.8
±
0.04 ms
64 kbps 0.3
±
0.015 ms 0.6
±
0.03 ms