User`s guide

4-24 DL3100 User’s Guide—November 1998
4
¥ Data Rate
This is a view-only Þeld. The Data Rate changes automatically to
correspond to the number of T3 slots selected (one timeslot is equal to
approximately 300 kbps).
¥ T3 Timeslots
Lets you allocate a certain number of T3 Timeslots on the main board to
this particular HSDB.
Enter the number of timeslots corresponding to the desired data rate
(approximately 300 kbps per timeslot).
There are a total of 147 timeslots available for DTE allocation. These
timeslots will be shared by any modules physically connected to the
T3MB.
¥ Clock ModeÑNormal and Divided Clock (DefaultÑNormal)
The normal clock always runs in a bursty, or gapped mode at 50.2
Mbps.
Divided clock is provided for devices that cannot run at normal clock
rate. This option causes the 50.2 Mbps clock to divide repeatedly until it
gets close to the actual DTE data rate.
¥ Connection
The connection address automatically displays when bandwidth has
been allocated to it.
¥ DTE Loss DetectionÑNone or TA (DefaultÑNone)
When the DTE loss detection is None, the DTE loss feature is disabled.
If the DTE loss detection is set to TA (Terminal Available), and the TA
lead is asserted, then the device is up. If the TA lead is not asserted, the
DL3100 assumes the DTE device is down and cuts the RT clock to the
DTE.
¥ CA OptionsÑAuto, Assert, or Deassert (DefaultÑAuto)
Auto relates to the network. If the network is up, CA (Carrier Available)
is on. If the network is down, CA is off. The conditions that reßect a
down state are: RX AIS RX OOF RX LOS TX LOS TX yellow and RX
yellow.
Assert turns CA on regardless of the network state.
Deassert turns CA off regardless of the network state.