
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
493
192
10-5
1.00
0
00000192
009789
001004
192
10-6
10.00
0
00000F98
00978F
000FEB
192
10-7
100.00
0
00009BD6
009792
000FE9
192
10-8
1,000.00
0
00061647
009793
000FE9
192
10-9
10,000.00
0
003CDEAD
009793
000FE9
Important Note:
The
user should NOT
use CMODE = 1 mode when working with Telcordia or ITU
requirements for the evaluation periods. In that case, the clearing time (eight times declare time)
would not be conform to the requirements (where clearing time requirement = declare time
requirement). For the same reason, the user should also avoid using CMODE = 1 with Telcordia
objectives when dealing with STS-1 or any detection threshold = 10-3.
The user should note that a probability of 99% was assumed as the probability that the switch
initiation time (declaring) is below the Telcordia requirement. Since the Telcordia specification
is vague regarding this issue (“must be very close to 1.0”), the approximation with 0.99 is
sufficient and lets the Telcordia requirements be identical to the ITU requirements.
The user should also note that the Telcordia objectives are stricter than Telcordia and ITU
requirements upon detection and clearing times. But Telcordia and ITU requirements are stricter
than Telcordia objectives upon detection and clearing probability for a given BER (99% vs 95%
for Telcordia objectives).
17.8 Using The Receive Trail trace Processor Features
The RTTP monitors a one-byte, 16-byte, or 64-byte trail trace message. To monitor a one-byte
message, the ALGO register bits must be set to 11 (algo3). The trail trace byte is captured at
address 40H. To monitor a 16-byte message, the ALGO register bits must be set to 01/10
(algo1/2) and the LENGTH16 register bit must be set to logic one. The trail trace message is
captured between the 40H and 4FH addresses. To monitor a 64-byte message, the ALGO
register bits must be set to 01/10 (algo1/2) and LENGTH16 register bit must be set to logic
zero. The trail trace message is captured between the 40H and 7FH addresses.
When SYNC_CRLF is low, the synchronization is based on the MSB of the trail trace byte.
Only one of the bytes has its MSB set high. The byte with its MSB set high is the first byte of
the message. When SYNC_CRLF is high, the synchronization is based on the CR/LF (CR =
0Dh, LF = 0Ah) characters of the trail trace message. The byte following the CR/LF bytes is
the first byte of the message.
Figure 23 Layout of Output Enable and Bidirectional Cells
1st BYTE
ALGO = 11
40H, 80H, C0H