MT9075A Mitel Networks Corporation, MT9075A Datasheet - Page 32

• Manufacturer Part Number: MT9075A
• Description: E1 Single Chip Transceiver
• Manufacturer: Mitel Networks Corporation

MT9075A
4-160
4-0
Bit
7
6
5
RxTRSP Receive Transparent Mode. When
HDLC0
HDLC1
Name
---
Table 17 - HDLC Selection Word
(Page 01H, Address 14H)
HDLC0 Select. If one, then HDLC0
is connected to the data link on
selected S
16 or 20 kbits/sec. If zero, HDLC0 is
deselected and all HDLC0 interrupts
are masked.
HDLC1 Select. If one, then HDLC1
is connected to time slot 16 in CCS
mode. If zero, HDLC1 is deselected
and
masked.
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.
Unused.
Functional Description
all
a
HDLC1
bits at a rate of 4, 8, 12,
interrupts
are
Bit
7
6
5
4
3
2
1
0
Table 18 - Coding and Loopback Control Word
MFRF
Name
MLBK
HDB3
DLBK
RLBK
SLBK
PLBK
---
(Page 01H, Address 15H)
Unused.
Metallic Loopback. If one, then the
external RRTIP and RRING signals
are isolated from the receiver, and
TTIP and TRING are internally
connected to the receiver analog
input instead. If zero, metallic
loopback is disabled.
High Density Bipolar 3 Encoding.
If zero, HDB3 encoding is enabled
in the transmit direction. If one, AMI
signal without HDB3 encoding is
transmitted.
decoded in the receive direction.
Multiframe Reframe. If one, for at
least one frame, and then cleared
the MT9075A will initiate a search
for a new signalling multiframe
position.
activated
transition of the MFRF bit.
Digital Loopback. If one, then the
digital stream to the transmit LIU is
looped back in place of the digital
output of the receive LIU. Data
coming out of DSTo will be a
delayed version of DSTi. If zero, this
feature is disabled.
Remote Loopback. If one, then all
bipolar data received on RRTIP/
RRING are directly routed to TTIP/
TRING on the PCM 30 side of the
MT9075A. If zero, then this feature
is disabled.
ST-BUS Loopback. If one, then all
time slots of DSTi are connected to
DSTo on the ST-BUS side of the
MT9075A. If zero, then this feature
is disabled. See Loopbacks section.
Payload Loopback. If one, then all
time slots received on RTIP/RRING
are connected to TTIP/TRING on
the ST-BUS side of the MT9075A
(this excludes time slot zero). If
zero, then this feature is disabled.
Preliminary Information
Functional Description
Reframing
on
HDB3
the
function
is
one-to-zero
always
is