tmxf28155 ETC-unknow, tmxf28155 Datasheet - Page 453

• Manufacturer Part Number: tmxf28155
• Description: Tmxf28155 Super Mapper 155/51 Mbits/s Sonet/sdh X28/x21 Ds1/e1
• Manufacturer: ETC-unknow

Preliminary Data Sheet
May 2001
19 VT/TU Mapper Functional Description
The Super Mapper provides access to all necessary functions associated the receive path overhead for each
VT/TU, specifically V5, J2, Z6/N2, Z7/K4, and the O bits. The following features are supported:
19.16.2 VT Mapper Transmit Path Overhead Interface Description
Agere Systems Inc.
Figure 46
LOPOHVALIDIN
LOPOH BITCNT
LOPOHDATAIN
V5, J2, Z6/N2, Z7/K4, and the O bits, on a per VT basis, will be stored for one complete superframe and transmit-
ted out on external output pin LOPOHDATAOUT (AB17) during the next superframe. REI and RDI values
received from the SPE mapper and TMUX will be stored on a per-frame basis and transmitted during the next
frame. REI and RDI values will be latched during the A1 time of the of the received SONET frame.
When operating in unidirectional path switch ring (UPSR) mode (VT_UPSR = 1
values in the V5 and Z7 bytes will be modified based on the receive status. See
Definitions on pag
Each data type out of LOPOHDATAOUT will be transmitted serially as a burst of 227 bits (VT1.5 mode) or
171 bits (VT2 mode) on the rising edge of the clock, LOPOHCLKOUT, which is driven out on external pin AB15.
The REI and RDI received from the SPE mapper and TMUX will be transmitted serially as a burst of 37 bits on
the rising edged of the clock, LOPOHCLKOUT.
The LOPOHVALIDOUT signal (driving external output pin AB18) is set to 1 when valid data is being transmitted.
Following transmission of any complete data type LOPOHVALIDOUT is held at 0 for at least eight
LOPOHCLKOUT cycles.
The first 3 bits transmitted, following a rising edge of LOPOHVALIDOUT, make up the data type header. Data
type 001 will be the first data type transmitted in each frame. V5, J2, and Z6 are transmitted respectively in the
first frame of the superframe. Z7 and the O bits are transmitted respectively in the second frame of the super-
frame. Note that the LOPOHDATAOUT data types are only transmitted in the first and second frames of the four
frame multiframe.
All data types must be transmitted within 500 µs.
LOPOHCLKIN
contains the VT mapper transmit path overhead serial channel format and timing.
0 1 2
0 0 1
TMUX/SPEMPR RDI/REI
Figure 46. VT Mapper Transmit Path Overhead Serial Access Channel
e440, for automatic generation requirements.
37
VTMPR VT#1—28 V5(MSB–>LSB)
0 1 2
0 1 0
MINIMUM OF 8 CYCLES
226
FRAME #1 OF MULTIFRAME
(continued)
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
VTMPR VT#1—28 J2(MSB–>LSB)
125 s
0 1 2
0 1 1
226
154 ns
TMXF28155/51 Super Mapper
(Table
Table 557, Data Type Header
VTMPR VT#1—28 Z6(MSB–>LSB)
0 1 2
1 0 0
181)), REI, RDI and ERDI
226
5-8329(F)r.2
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