tmxf28155 ETC-unknow, tmxf28155 Datasheet - Page 462

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

155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
20 M13/M23 MUX/DeMUX Block Functional Description
20.6.2 E1 Mode
In the E1 mode, the 3 signals interleaved to generate the y
selectors 4y – 3, 4y – 2, and 4y – 1.
Although it is not part of the G.747 standard, loopback requests for an E1 channel can be indicated as in the DS1
mode by inverting the third C bit for that channel. This is done if the M13_DS1_LB_REQx bit is set. The 3
M13_DS1_LB_REQx bits that affect the y
The remote alarm indication (RAI) bit and the reserved bit are set to the value of M13_DS2_RAI_SENDy and
M13_DS2_RSV_SENDy register bits,
For testing purposes, the frame alignment signal (normally 111010000 as specified in G.747) is generated with the
last bit inverted (111010001) if M13_DS2_FINVy is set, and the parity bit is inverted if M13_DS2_MPINVy is set.
The first parity bit after a 0 to 1 transition of SMPR_BER_INSRT
set to 1
462
RXSYNC (OPTIONAL)
TXSYNC (OPTIONAL)
DS3POSDATAOUT
DS3POSDATAOUT
LINE_TXDATA29
LINE_RXDATA29
LINE_RXCLK29
LINE_TXCLK29
(Table
RXDATAEN
TXDATAEN
269).
Figure 50. DS3 NSMI Transmit Operation
Figure 51. DS3 NSMI Receive Operation
(Table
th
DS2 are 4y – 3, 4y – 2, and 4y – 1.
266) respectively (G.747).
VARIABLE
VARIABLE
th
DS2 signal are the outputs from DS1/E1 loopback
(Table
FRAME BIT
FRAME BIT
UNUSED
65) is also inverted if M13_DS2_P_BERy is
UNUSED
(continued)
Agere Systems Inc.
May 2001
0781(F)
0782(F)