tfra08c13 ETC-unknow, tfra08c13 Datasheet - Page 72

• Manufacturer Part Number: tfra08c13
• Description: Tfra08c13 Octal T1/e1 Framer
• Manufacturer: ETC-unknow

TFRA08C13 OCTAL T1/E1 Framer
Alarms and Performance Monitoring
Table 31. AUXP Synchronization and Clear Sychronization Process
72
CEPT auxiliary pattern alarm (AUXP) (FRM_SR1 bit 6). The received auxiliary alarm, register FRM_SR1 bit 6
(AUXP), is asserted when the receive framer is in the LFA state and has detected more than 253 10 (binary) pat-
terns for 512 consecutive bits. In a 512-bit interval, only two 10 (binary) patterns are allowable for the alarm to be
asserted and maintained. The 512-bit interval is a sliding window determined by the first 10 (binary) pattern
detected. This alarm is disabled when three or more 10 (binary) patterns are detected in 512 consecutive bits.
The search for AUXP is synchronized with the first alternating 10 (binary) pattern as shown in Table 31.
00
—
(NT1 REMOTE)
E BIT = 0
NT2
sync
10
T REFERENCE
CRC ERROR
Figure 27. The T and V Reference Points for a Typical CEPT E1 Application
DETECTED
POINT
10
—
CRC-4 ERRORS AT THE NT1
E BIT = 0, ERROR EVENT DETECTED AT THE NT1 REMOTE
01
CRC-4 ERRORS DETECTED FROM NT1 REMOTE, THEN SET Sa6 = 001X
E = 0 DETECTED FROM NT1 REMOTE, THEN SET Sa6 = 00X1
—
E BIT = 0
NT1
Sa6
11
—
clear sync
V REFERENCE
CRC ERROR
11
DETECTED
POINT
(continued)
CRC-4 ERRORS AT THE ET,
E BIT = 0, ERROR EVENT AT THE ET REMOTE
00
—
00
—
—
0
sync
10
Preliminary Data Sheet
. . .
00
Lucent Technologies Inc.
Lucent Technologies Inc.
COUNT:
1) CRC ERRORS,
2) E = 0,
3) Sa6 = 001X, AND
4) Sa6 = 00X1
October 2000
ET
. . .
10
5-3913(F)r.8