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參數(shù)資料
| 型號(hào)： | TTSI1K16T |
| 英文描述： | 1024-Channel, 16-Highway Time-Slot Interchanger |
| 中文描述： | 1024通道，16道時(shí)隙交換器 |
| 文件頁數(shù)： | 14/64頁 |
| 文件大?。?/td> | 1110K |
| 代理商： | TTSI1K16T |
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TTSI1K16T
1024-Channel, 16-Highway Time-Slot Interchanger
Preliminary Data Sheet
February 1999
14
Lucent Technologies Inc.
Interchange Fabric
The time-slot interchanger core has a memory-based architecture. The received time slots are converted from
serial to parallel by the receive highways block and stored in an internal dual-ported memory called the data store,
see Figure 1, Block Diagram of the TTSI1K16T on page 6. These time slots are then read out of the data store in
the order specified by the connection store, converted from parallel to serial by the transmit highways section, and
sent out on the transmit highways.
All the time slots (bytes) coming into the device are stored in the data store. Each TDM highway can bring in up to
32 valid time slots at 2.048 Mbits/s, 64 time slots at 4.096 Mbits/s, or 128 time slots on an 8.192 Mbits/s highway,
during a 125
μ
s frame. With 8 Rx highways running at the maximum rate of 8.192 Mbits/s, the maximum capacity
of the switch will be utilized. The addresses used to retreive the data from the data store are stored in the connec-
tion store. If host substituted data is to be transmitted instead of data that was received on a TDM highway, then it
is stored in the connection store.
Note that this device can switch any 1024 time slots from the 2048 possible recieve time-slot positions, restricted
only by the data rate selection criteria for the Rx highways (see Table 6, Rx Highway Data Rate Options, on page
18). Similarily on the Tx side, this device can place the 1024 switched time slots into any of the 2048 possible
transmit time-slot positions, restricted only by the Tx data rate selection criteria (see Table 7, Tx Highway Data
Rate Options, on page 18).
Any mode that is selected on a time-slot basis is typically made via the connection store. There are 4096 bytes in
the connection store, two for each time slot that can be selected for transmission. Each one of the 2048 possible
transmit time slots can be individually 3-stated. This is useful when multiple devices need to drive the same TDM
highway as a bus or backplane. For extra drive, 16 individual output enables (TXOE pins) are also provided to indi-
vidually control an external bus or backplane driver, one for each transmit highway. A low latency (send as soon as
possible) or frame integrity (keep tagged time slots from the same highway together in the same frame) can also
be selected on a time-slot basis. The user also has the option to send one of 13 predefined test patterns, a user-
defined byte, or one of three user-defined idle codes, on any time slot of any Tx highway.
Time slots received on any TDM highway can be easily broadcasted on any transmit highway using the connection
store. If, for example, the entire connection store is filled with all zeros, this then implies low-latency mode and that
the source for all transmitted data is Rx highway 0, time slot 0. Thus, the data received on RXD0 time slot 0 will end
up being broadcasted on all outgoing time slots.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TTSI1K16T3TL | 1024-Channel, 16-Highway Time-Slot Interchanger |
| TTSI1K16T | 1024-Channel, 16-Highway Time-Slot Interchanger(1024通道、16路干線時(shí)隙交換機(jī)) |
| TTSI2K32T | 2048-Channel, 32-Highway Time-Slot Interchanger |
| TTSI2K32T3BAL | 2048-Channel, 32-Highway Time-Slot Interchanger |
| TTSI2K32T | 2048-Channel, 32-Highway Time-Slot Interchanger(2048通道、32路干線時(shí)隙交換機(jī)) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TTSI1K16T3TL | 制造商:AGERE 制造商全稱:AGERE 功能描述:1024-Channel, 16-Highway Time-Slot Interchanger |
| TTSI1K16T3TL-DB | 制造商:LSI 功能描述: 制造商:LSI Corporation 功能描述: |
| TTSI2K32T | 制造商:AGERE 制造商全稱:AGERE 功能描述:2048-Channel, 32-Highway Time-Slot Interchanger |
| TTSI2K32T3BAL | 制造商:AGERE 制造商全稱:AGERE 功能描述:2048-Channel, 32-Highway Time-Slot Interchanger |
| TTSI4K32T | 制造商:AGERE 制造商全稱:AGERE 功能描述:4096-Channel, 32-Highway Time-Slot Interchanger |
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