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PM73121 Datasheet(PDF) 32 Page - PMC-Sierra, Inc |
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PM73121 Datasheet(HTML) 32 Page - PMC-Sierra, Inc |
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32 / 223 page  PM73121 AAL1gator II PMC-Sierra, Inc. PMC-980620 ,VVXH AAL1 SAR Processor Data Sheet QSPQSD@U6S`Ã6I9Ã8PIAD9@IUD6GÃUPÃQH8TD@SS6ÃDI8Ã6I9ÃAPSÃDUTÃ8VTUPH@ST¶ÃDIU@SI6GÃVT@ (DS0s), which are 64 Kbit/s channels, the AAL1gator II is an ideal vehicle for constructing ATM-based DACS and other circuit emulation devices. Structured data format is suited for these types of networks and underlying services. The SDF-MF mode is primarily used for applications that need to pass CAS, which carries the ABCD signaling bits. CAS is still common in many TDM networks. The SDF-FR mode, which transfers no signaling, is also supported. In SDF-MF mode, individual queues can be configured to transfer no signaling. This is the equiv- alent to SDF-FR mode for a given queue. 2.1.1 Structured Cell Formats Figure 8 shows examples of four structured cell formats. In the partially filled cell examples, the partially filled level has been set to 42 payload bytes. Figure 8. Examples of Structured Cell Formats GFC/VPI VPI VPI VCI VCI VCI PTI CLP HEC CSI SN SNP Pointer Payload 1 Payload 46 . . . Cell with Pointer 46 Payload Bytes GFC/VPI VPI VPI VCI VCI VCI PTI CLP HEC CSI SN SNP Payload 1 Payload 2 Payload 47 . . . Cell without Pointer 47 Payload Bytes GFC/VPI VPI VPI VCI VCI VCI PTI CLP HEC CSI SN SNP Pointer Payload 1 Payload 42 . . . Partially Filled Cell with Pointer 42 Payload Bytes GFC/VPI VPI VPI VCI VCI VCI PTI CLP HEC CSI SN SNP Payload 1 Payload 2 Partially Filled Cell without Pointer 42 Payload Bytes Payload 42 . . . |
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