Figure 2. Time Slot Usage - ADTRAN Total Access 750 BCU DSX-1 Installation And Maintenance Manual

1. Select Bank Controller (1), Provisioning (2),
FT1 (2), FT1 Channels (4)
2. Figure 2 shows the current time slots in use by
the TA 750. Time slots labeled "open" may be
added to the DSX-1 port. To add a time slot,
enter 1 or 2 then the time slot to be added. If
signaling should be passed from the primary T1
to the DSX-1 port, select 2. Otherwise, select 1
for clear channel operation.
3. To remove a time slot, enter 3, then the time
slot to be removed.
The screen will be updated as time slots are added or
removed. Below are guidelines for assigning/
removing timeslots from the Fractional T1 (DSX-1):
1. Time slots cannot be assigned to the Fractional
T1 from access modules installed in the bank
(i.e. FXS, FXO, OCU DP, DSO DP) with the
exception of the Nx56/64 module.
2. Timeslots assigned to the Nx56/64 module may
be reassigned to the Fractional T1.
3. Timeslots are assigned to the Fractional T1 in
the same position as located in the primary T1
(i.e. slot 1 can only be assigned to slot 1 in the
Fractional T1).
Slot: 6
Unacknowledged Alarms: NONE
Time Slot Usage
1 2
Open Open
9 10
Open Open
17 18
Open Open
4
Total Access 750
3 4 5
Open Open Open
11 12 13
Open Open Open
19 20 21
Open Open Nx56/64 Nx56/64 Nx56/64 Nx56/64
Slot: 6
1. Add Clear Time Slot
2. Add Signaling Time Slot
3. Remove Time Slot
Selection :
'?' - System Help Screen

Figure 2. Time Slot Usage

Section 61175012L2-5, Issue 4
NOTE
If a timeslot is assigned to the Fractional T1
(DSX-1) port and an access module is inserted
into a slot which usually assigns the timeslot
to that access module, the BCU will prohibit
the access module from acquiring any
timeslots. This action is done to ensure
timeslots assigned to the DSX-1 port are not
"stepped on" by inserting access modules. If
this condition occurs, the LEDs on the access
module will continue to sequence.
CONNECTIONS
All TA 750 BCU connections are made through the
backplane connector. With the exception of power
and the V.35 connector, all of the TA 750 rear panel
connectors terminate on the BCU. These include
Network T1, Clock source, Alarms, Fractional T1
(DSX-1), and Management. Refer to the TA 750
Chassis Installation and Maintenance Practice, part
number 61175001L1-5, for additional information on
rear panel connections. Table 3 describes the T1
pinout connectors and Table 4 describes the FT1
pinout connectors.
6 7
Open Open
14 15
Open Open
22 23
Slot: 6 Slot: 6
8
Open
16
Open
24
Slot: 6
61175012L2-5D