Zhone Technologies 900 - Manual (Page 94)

3-6 IMACS System Release 5.1.6 Data Cards
Model No. Running Head OCU-DP Card User Screens and Settings OCU-DP Card
The SR TS number selected will be the first segment occupied by this circuit. If a 19.2 kbps
circuit occupies two segments of the b-5 frame, selecting SR TS 1 will assign it to segments
1 and 2. Segments 3, 4 and 5 may be assigned independently to 9.6 kbps (or less) circuits from
other OCU-DP cards.
If a circuit is assigned that exceeds the slots necessary to accommodate it, such as a 19.2 kbps
circuit to SR TS 5 in b-5 framing, the message "Invalid SR TS" will be displayed. If a circuit
requires more space than the SR TS has available, such as a having a 19.2 kbps circuit assigned
to SR TS 1, a 19.2 kbps circuit assigned to SR TS 3 and then attempting to assign a 19.2 kbps
circuit to SR TS 4, the message "SR TS overlapping" will be displayed.
Figure 3-2. Data Frames, Rates, and Time Slot Assignments
MODE
The Mode setting options are ocu and csu. You should select ocu whenever the OCU-DP port
is attached to a DSU/CSU over a 4-wire circuit. In that mode, the OCU-DP port will generate
the necessary sealing current and the DSU/CSU will terminate it. The csu mode should not be
used unless you have two back-to-back OCU-DP ports. In that case, to achieve proper
orientation and sealing current, configure one of two OCU-DP ports for the ocu mode and the
other for the csu mode. The csu mode is not supported on the OCU-DP 5 Card, which has five
or ten ports.
a b-5 b-10 b-20
56k 19.2k* 4.8k 2.4k
Framing
Maximum
TS #1 TS #2 TS #3 TS #4
WAN #1, Port #1 (w1-1)
Speed
* A 19.2 kbps circuit will occupy two contiguous 9.6 kbps subrate time slots.