cx29503 Mindspeed Technologies, cx29503 Datasheet - Page 84

• Manufacturer Part Number: cx29503
• Description: Cx29503 Broadband Access Multiplexer Data Sheet
• Manufacturer: Mindspeed Technologies

Functional Description
2.10.4
2.10.4.1
2.10.4.2
Table 2-7. TSB Data Paths and Bus Rates
2-36
FOOTNOTE:
(1)
(2)
(1)
1
2
3
4
5
6
7
The numbers in this column are used for reference purposes (see
Unchannelized STS-1, unchannelized DS3, unchannelized E3, 28 x DS1, 21 x E1, 16 x E1, mixed DS1/E1.
Line Interface
SONET/SDH
Serial DS3
Serial DS3
Serial DS3
Serial DS3
Serial E3
Serial E3
Details of Payload TSB
Data Path Signals
The Payload TSB frame can be configured to transport payload data for any of the
following signal types: DS1, E1, unchannelized DS3, unchannelized E3, and
unchannelized STS-1. The Payload TSB can also be configured to carry the payload
from a mix of DS1 and E1 signals.
S
Stuff bytes are inserted into the Payload TSB to compensate for differences in the data
rate of the TSB and the data rate of the data carried on the bus in both the transmit and
receive directions.
In general, the CX29503 asserts the transmit and the receive stuff signals to initiate or
mark the insertion of stuff bytes into Payload TSB frames to compensate for data rate
offsets that exist between the TSB bandwidth and the bandwidth of the payload
carried on the bus.
Table 2-7
bus rate is based on either the DS3, E3, or SONET line rates. When running at the
TSB bus rate of 51.840 Mbps, stuff bytes are added to the TSB Interface.
Section 2.10.6.1
TSB_TSTUFF, and the receive stuffing signal, TSB_RSTUFF, respectively.
tuff Byte Compensation
unchannelized DS3
28 × DS1
21 × E1
mixed DS1/E1
unchannelized E3
16 × E1
Note
TSB Signal Type
(2)
summarizes the bus rates for each type of transport signal format. The TSB
Mindspeed Technologies™
gives timing diagrams for the transmit stuffing signal,
Preliminary Information
Payload TSB
Table
Bus Rate
(Mbps)
44.736
44.736
44.736
44.736
44.736
44.736
51.840
4-10).
Overhead TSB
Bus Rate
(Mbps)
11.184
11.184
11.184
11.184
11.184
11.184
12.96
CX29503 Data Sheet
29503-DSH-002-B