MT90863
Advance Information
Data Rate
BCAB Bits Used to Determine the Source Channel of the Connection
2.048 Mb/s
8.192 Mb/s
BCAB4 to BCAB0 (32 channel/frame)
BCAB6 to BCAB0 (128 channel/frame)
2.048 Mb/s
Sub-rate Switching
BCAB4 to BCAB0 (32 channel/frame)
BCAB6 to BCAB0 (128 channel/frame)
Table 18 -. BCAB Bits Programming for Different Data Rates
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
LCAB
6
LSAB
4
LSAB LSAB LSAB LSAB
LCAB LCAB LCAB LCAB LCAB LCAB
L/B
BV/C BMC
OE
3
2
1
0
5
4
3
2
1
0
Bit
Name
Description
15
L/B
Local/Backplane Select
When 1, the output channel of STo0-15 comes from STi0-15 (local)
When 0, the output channel of STo0-15 comes from:
STio0-31 (backplane, 2Mb/s mode)
STio0-31 (backplane, 4Mb/s mode)
STio0-15 (blackplane, 8Mb/s mode)
STio0-23 (blackplane, HMVIP mode)
14
13
LV/C
LMC
Variable /Constant Throughput Delay. This bit is used to select either
variable (low) or constant delay (high) modes on a per-channel basis for the
source streams.
Message Channel. When 1, the contents of the local connection memory are
output on the corresponding output channel and stream. Only the lower byte
(bit 7 - bit 0) will be output to the STo pins of the local interface. When 0, the
backplane or local data memory address of the switched input channel and
stream is loaded into the local connection memory.
12
OE
Output Enable. This bit enables the drivers of STo pins on a per-channel
basis. When 1, the STo output driver functions normally. When 0, the STo
output driver is in a high-impedance state.
11-7
(Note 1)
LSAB4-0
LCAB6-0
Source Stream Address Bits. The binary value identifies the data stream for
the source of the connection.
6-0
Source Channel Address Bits. The binary value identifies the channel for the
(Note 1)
source of the connection.
Note 1: If bit 12 (LMC) of the corresponding local connection memory location is 1 (device in message mode), then these entire 8
bits (LSAB0, LCAB6 - LCAB0) are output on the output channel and stream associated with this location.
Table 19 -. Local Connection Memory Low Bits
22
MITEL [ MITEL NETWORKS CORPORATION ]
