mt9075bpr1 Zarlink Semiconductor, mt9075bpr1 Datasheet - Page 41

• Manufacturer Part Number: mt9075bpr1
• Description: E1 Single Chip Transceiver With Liu
• Manufacturer: Zarlink Semiconductor

Bit
7
6
5
4
3
2
1
0
MFRF
Name
MLBK
HDB3
DLBK
RLBK
SLBK
PLBK
(0)
(0)
(0)
(0)
(0)
(0)
(0)
---
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. HDB3 is always decoded in the receive direction.
Multiframe Reframe. If one, for at least one frame, and then cleared the
MT9075B will initiate a search for a new signalling multiframe position.
Reframing function is activated on the one-to-zero 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 MT9075B. 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 MT9075B. 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 MT9075B (this
excludes time slot zero). If zero, then this feature is disabled.
Table 18 - Coding and Loopback Control Word
(Page 01H, Address 15H)
Zarlink Semiconductor Inc.
MT9075B
Functional Description
41
Data Sheet