TXC-06412BROG Transwitch Corporation, TXC-06412BROG Datasheet - Page 142

• Manufacturer Part Number: TXC-06412BROG
• Manufacturer: Transwitch Corporation

Specifications of TXC-06412BROG

• Lead Free Status / Rohs Status: Compliant

PHAST-12P Device
DATA SHEET
TXC-06412B
PRELIMINARY TXC-06412B-MB, Ed. 2
June 2005
11.13.1 Egress Direction
11.13.1.1 Shared Settings for all PPP streams
11.13.1.2 Per PPP Stream Settings
11.13.1.3 Per PPP Stream Status & Alarms
The Frame Length is defined as the number of bytes between two flags (including the
optional header and FCS 16 or 32).
• Minimum Frame Length (0 . . . 127 bytes)
• Maximum Frame Length (0 . . . 65535 bytes): all longer frames are always discarded
• Transparent fragment size (64, 128, 256 or 1024 bytes): size of each fixed-length
• Enable/disable one second performance monitoring mechanism (shared with egress
• FIFO Threshold: the number of free words which has to be available in the synchroniza-
• Enable/disable demapping (shared with egress ATM)
• Enable/disable descrambling
• Enable/disable transparent mode: when enabled, the HDLC functionality is bypassed,
• Enable/disable Address and Control fields check: when enabled, packets of which the
• Enable/disable Address and Control fields stripping: when enabled, Address and Control
• Enable/disable FCS check: when disabled, all consequent actions: status incl. counters &
• Enable/disable FCS stripping (don’t care in transparent mode)
• FCS size (16 or 32 bit) (don’t care in transparent mode)
• FIFO Overflow: overflow occurred in Rx FIFO while a packet is being received (shared
POS-PHY “packet” (only used for PPP streams for which transparent mode is enabled)
ATM)
tion FIFO in the Rx direction before the POS/ATM Demapper starts writing data from the
SDH/SONET line to that FIFO. This value must always be greater than 4. Note that set-
ting this value to X means that once writing of a packet to the FIFO is started, at least 2X-
1 (2X-5 in Transparent mode) number of bytes can be written (shared with egress ATM).
i.e., all payload bytes are passed through transparently (no framing, no byte destuffing,
no abort detection, no FCS processing).
Address field does not equal 0xFF and/or the Control field does not equal 0x03 are fil-
tered (discarded). (don’t care in transparent mode).
fields are stripped if their value is equal to 0xFF03 (don’t care in transparent mode)
interrupts and signaling on POS-PHY interface are also disabled - see below (don’t care
in transparent mode)
with egress ATM)
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High Order Pointer Tracking, Retiming and Pointer Generation
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