MH8910-1AC Просмотр технического описания (PDF) - Mitel Networks
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MH8910-1AC Datasheet PDF : 26 Pages
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MT8910-1
Preliminary Information
the superframe position. This function can also be
activated in software (LT mode only) through a bit in
Control Register 1 (TxSFB). The transition of this bit
from a 1 to a 0 will reset the superframe counter, and
the beginning of the transmitted superframe will be
referenced to the ST-BUS frame after the frame in
which the transition in the TxSFB bit occurred.
In the NT mode, the SFb pin is an output which
generates an active low signal at the boundary of the
transmit superframe. Since the SFb is referenced to
the receive time base, SFb is only valid after
superframe synchronization has been achieved. In
the NT mode, the TxSFB bit is ignored since the
transmit superframe has a fixed phase relationship
with respect to the received superframe.
The MT8910-1 has two possible system port
configurations; single port mode or dual port mode.
In the single port mode, the MT8910-1 uses the first
four timeslots of the DSTi and DSTo data streams
(as shown in Figure 8). ST-BUS Channel 0 is
allocated to the D-channel, ST-BUS Channel 1 to the
C-channel, while ST-BUS Channel 2 and 3 are
F0b
C4b
DSTo AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD0 D1
DSTi AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD0 D1
F0od
C7 C6
C7 C6
C1 C0 B7 B6
C1 C0 B7 B6
15.6 µsec
B1 B0 B7 B6
B1 B0 B7 B6
B1 B0AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA D0
B1 B0AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA D0
Reserved
Channel Time 0
D-Channel
Channel Time 1
C-Channel
Channel Time 2
B1-Channel
Channel Time 3
B2-Channel
Figure 8 - ST-BUS Channel Assignments in Single Port Mode
F0b
C4b
DSTi AAAAAAAAAAAAAAAAAAAAAAAAA B7
B6
B5
B4
B3
B2
B1
B0 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA B7
B6
B5
B4
B3
B2
B1
B0 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA B7
CDSTi AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA C7
C6
C5
C4
C3
C2
C1
C0 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD0
D1
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA C7
DSTo AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA B7
B6
B5
B4
B3
B2
B1
B0 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA B7
B6
B5
B4
B3
B2
B1
B0 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA B7
CDSTo AAAAAAAAAAAAAAAAAAAAAAAAA C7
C6
C5
C4
C3
C2
C1
C0 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD0
D1
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA C7
F0od
3.9 µsec
62.5 µsec
125 µsec
Reserved
9-12
Channel Time 0
Channel Time 16
Figure 9 - ST-BUS Channel Assignment in Dual Port Mode
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