MT9075B Datasheet, PDF (40/102 Pages) Mitel Networks Corporation – E1 Single Chip Transceiver

MT9075B
Data Sheet
Bit Name
Functional Description
7 -4 TMA1-4 Transmit Multiframe Alignment Bits One to Four. These bits are
(0) ^{transmitted on the PCM 30 2048 kbit/sec. link in bit positions one to four}
of time slot 16 of frame zero of every signalling multiframe. These bits
are used by the far end to identify specific frames of a signalling
multiframe. TMA1-4 = 0000 for normal operation.
3
X1 This bit is transmitted on the PCM 30 2048 kbit/sec. link in bit position
(1) ^{five of time slot 16 of frame zero of every multiframe. X1 is normally set}
to one.
2
Y This bit is transmitted on the PCM 30 2048 kbit/sec. link in bit position six
(1) ^{of time slot 16 of frame zero of every multiframe. It is used to indicate the}
loss of multiframe alignment to the remote end of the link. If one - loss of
multiframe alignment; if zero - multiframe alignment acquired. This bit is
ignored when AUTY is zero (page 01H, address 11H).
1-0
X2, X3 These bits are transmitted on the PCM 30 2048 kbit/sec. link in bit
(11) ^{positions seven and eight respectively, of time slot 16 of frame zero of}
every multiframe. X2 and X3 are normally set to one.
Table 16 - Transmit MF Alignment Signal
(Page 01H, Address 13H)
Bit Name
Functional Description
7 HDLC0 HDLC0 Select. If one, then HDLC0 is connected to the data link on
(0) ^{selected S}a ^{bits at a rate of 4, 8, 12, 16 or 20 kbits/sec. If zero, HDLC0}
is deselected and all HDLC0 interrupts are masked.
6 HDLC1 HDLC1 Select. If one, then HDLC1 is connected to time slot 16 in CCS
(0) ^{mode. If zero, HDLC1 is deselected and all HDLC1 interrupts are}
masked.
5 RxTRSP Receive Transparent Mode. When this bit is set to one, the framing
(0) ^{function is disabled on the receive side. Data coming from the receive}
line passes through the slip buffer and drives DSTo with an arbitrary
alignment. When zero, the receive framing function operates normally.
4-0 --- Unused.
Table 17 - HDLC Selection Word
(Page 01H, Address 14H)
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