cx28500 Mindspeed Technologies, cx28500 Datasheet - Page 29

• Manufacturer Part Number: cx28500
• Description: Cx28500 Multichannel Synchronous Communications Controller
• Manufacturer: Mindspeed Technologies

1.7
The CX28500’s feature list includes the following:
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28500-DSH-002-C
A 1024-channel, full-duplex link layer controller for synchronous applications is provided.
32 full-duplex physical interfaces (i.e., ports) with independent clock rates are provided. CX28500 implements
32 serial ports that are individually programmable to operate either as conventional serial ports or TSBUS
serial ports. Conventional serial ports’ input/out data streams can be configured as channelized or
unchannelized bit streams. As for TSBUS serial ports, they are channelized by definition. Clock rates may be
as high as 52 MHz (for the first six ports) or 13 MHz (for the remaining 26 ports, see
General purpose HDLC (ISO 3309) is supported.
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Hyperchannels and subchannels are supported.
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HDLC/SDLC
HSSI
ISDN D-channel (LAPD/Q.921)
X.25 (LAPB)
SS7
Frame Relay (LAPF/ANSI T1.618)
Inter System Link Protocol (ISLP) support
LAPDm support
ATM/SMDS DXI
Transparent unformatted mode
Point-to-Point-Protocol (PPP)
Hyperchannel mode
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Subchanneling mode
Each channel can be programmed to either use a complete DS0 time slot or mask any subset of a time
slot. A signal mask is defined per-channel basis that has an enabled bit per each time slot. The mask bit
indicates whether the whole DS0 or part of it is enabled
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ISDN Primary Rate Interface (PRI)
ISDN Primary Rate Adapter (PRA)
Fractional T1 (FT1)
Fractional E1 (FE1)
Fractional Nx64K
SONET/SDH/PDH paths connected via TSBUS, which include: Mixed VT1.5/VT2 paths, Mixed TU-11/
TU-12 paths, and Mixed T1/E1 paths
Multiple lines muxed to 1 port, which include: Digital Subscriber Line Access Multiplexer (DSLAM) and
T1/E1 Frame Relay
ISDN Basic Rate Interface (BRI)
ISDN Basic Rate Adapter (BRA)
Frame Relay 56K and Nx56K
Compressed Voice Transparent Channels (e.g., ADPCM)
Centralized Signaling Channel Controllers, which include: Link Access Procedure D-Channel (LAPD),
Common Channel Signaling (CCS), and Signaling System #7 (SS7)
Feature Summary
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Mindspeed Technologies
®
Table
1-2).
Introduction
14