tmxf28155 ETC-unknow, tmxf28155 Datasheet - Page 405

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

Preliminary Data Sheet
TMXF28155/51 Super Mapper
May 2001
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
18 SPE Mapper Functional Description
(continued)
18.11 Serial STS-1 SPE Channel (NSMI)
The SPE mapper has the capability of accepting a clear serial STS-1 SPE signal at 51.84 MHz rate. The intent is to
map/demap the network serial multiplexed interface (NSMI) interface data.
The receive section of the SPE mapper outputs a serial data at 51.84 MHz rate, a clock enable signal inhibited dur-
ing overhead insertion times, and a sync signal whose position within the STS-1 frame is programmable to a cer-
tain extent (is programmable to occupy any STS-1 column position (numbers 0—89) within a fixed row (# 8)),
through bits SPE_R_NSMI_BIT[2:0]
(Table
153) and SPE_R_NSMI_COL[6:0]
(Table
153).
The transmit section of the SPE mapper inputs serial data at 51.84 MHz rate, outputs a clock enable signal inhib-
ited during overhead insertion times and a sync signal whose position within the STS-1 frame is programmable to a
certain extent (is programmable to occupy any STS-1 column position (numbers 0—89) within a fixed row (#8)),
through bits, SPE_T_NSMI_BIT[2:0] and SPE_T_NSMI_COL[6:0]
(Table
153).
The STS-1 SPE data is then mapped as AU-3 signal for the North American digital systems.
LINE_RXCLK29
RXDATAEN
VARIABLE
RXSYNC (OPTIONAL)
UNUSED
LINE_RXDATA29
0786(F)(F)
Figure 33. STS-1 NSMI Receive Operation
Agere Systems Inc.
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