MT9075B
Preliminary Information
Bit
Name
Functional Description
Bit
Name
Functional Description
7 -4 TMA1-4 Transmit Multiframe Alignment
7
HDLC0 HDLC0 Select. If one, then HDLC0
is connected to the data link on
Bits One to Four. These bits are
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
(0)
(0)
selected S bits at a rate of 4, 8, 12,
a
16 or 20 kbits/sec. If zero, HDLC0 is
deselected and all HDLC0 interrupts
are masked.
6
5
HDLC1 HDLC1 Select. If one, then HDLC1
identify specific frames of
a
is connected to time slot 16 in CCS
mode. If zero, HDLC1 is deselected
and all HDLC1 interrupts are
masked.
(0)
signalling multiframe. TMA1-4 =
0000 for normal operation.
3
2
X1
(1)
This bit is transmitted on the PCM
30 2048 kbit/sec. link in bit position
five of time slot 16 of frame zero of
every multiframe. X1 is normally
set to one.
RxTRSP Receive Transparent Mode. When
this bit is set to one, the framing
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.
(0)
Y
This bit is transmitted on the PCM
30 2048 kbit/sec. link in bit position
six 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)
4-0
---
Unused.
Table 17 - HDLC Selection Word
(Page 01H, Address 14H)
1 - 0 X2, X3 These bits are transmitted on the
PCM 30 2048 kbit/sec. link in bit
positions seven and eight
(11)
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)
32
MITEL [ MITEL NETWORKS CORPORATION ]
