cx29503 Mindspeed Technologies, cx29503 Datasheet - Page 76

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

Functional Description
2.9
2-28
M13/E13 Multiplexer (MUX) Block
The M13/E13 MUX block is used to multiplex and demultiplex 28 DS1signals to a
DS3 signal in the North American digital telephony hierarchy and 16 E1 signals to an
E3 signal in the European digital telephony hierarchy. Also, the multiplexing of 21 E1
signals into a DS3 signal is supported per the G.747 standard. A combination of DS1
and E1 signals can be multiplexed into a DS3 as long as the same type of lower rate
(DS1/E1) signals are multiplexed into a single DS2.
E13 MUX block.
The M13/E13 block interfaces to the DS3/E3 framer on its line side and to the DS1/
E1 Framer block on its system side. Also, a mode is provided where the
unchannelized DS3/E3 interfaces directly to the TSB on the system side.
controlled by the software register setting. Each mode is distinct and mutually
exclusive, i.e, the block can operate in only 1 mode at any given time. The 3 modes are
as follows:
The M13/E13 block is capable of operating in 3 different modes. Mode selection is
1. M13—Two-stage multiplexing/demultiplexing is implemented. Four DS1 or 3
2. E13—Two-stage multiplexing/demultiplexing is implemented. Sixteen E1
3. Unchannelized bypass—In this mode, the multiplexer is bypassed and an
E1 signals are multiplexed/demultiplexed into 1 DS2 signal. Seven such DS2
signals are multiplexed into/from 1 DS3 signal.
signals are multiplexed/demultiplexed into/from 4 E2 signals which are then
multiplexed into/from 1 E3 signal.
Unchannelized DS3/E3 from the framer is forwarded to the TSB.
Mindspeed Technologies™
Preliminary Information
Figure 2-11
illustrates the M13/
CX29503 Data Sheet
29503-DSH-002-B