PM5364 pmc-sierra, PM5364 Datasheet - Page 112

• Manufacturer Part Number: PM5364
• Description: Tupp 2488 Assp Telecom Standard
• Manufacturer: pmc-sierra

10.6.5
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2011334, Issue 7
The VTPI detects for loss of pointer and pointer re-acquisition for each tributary, and optionally
generates interrupts. Tributary alarm indication signal (AIS) is also detected and interrupts are
optionally generated upon detection of AIS and its removal. Externally provided high order AIS
conditions are optionally translated to low order tributary AIS conditions on a per STS-1/STM-0
basis.
The VTPI optionally bypasses selected low order control signals in a transparent mode or
generates them internally.
New incoming tributary pointer values may be filtered until confirmed by receipt of the same
pointer values three times or the changes are corrected by receiving the new data flag in the
corresponding incoming tributary payload pointer.
Per tributary performance monitoring is supported via positive and negative justification counts
and a performance monitoring interface.
Incoming STS-1 path overhead bytes are transferred to the outgoing stream. There are no
justification events performed. Therefore, the incoming and outgoing streams maintain identical
frame rates and justification events.
Receive Tributary Trace Buffer (RTTB336)
The RTTB336 is a SONET/SDH STS-12/STM-4 Receive Tributary Trace Buffer. A tributary
trace message (SONET) or a trail trace identifier (SDH) contains a repetitive path access point
identifier so that a path receiving terminal can verify its continued connection to the intended
transmitter. Tributary trace messages or trail trace identifiers are contained in both J1 and J2
bytes. Formats for tributary trace messages and trail trace identifiers differ slightly from
standard to standard, but are typically like the ones shown in Table 11.
TUPP™ 2488 ASSP Telecom Standard Product Data Sheet
Released
112