tfra08c13 ETC-unknow, tfra08c13 Datasheet - Page 68

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

TFRA08C13 OCTAL T1/E1 Framer
Alarms and Performance Monitoring
Table 26. Red Alarm or Loss of Frame Alignment Conditions
Table 27. Remote Frame Alarm Conditions
68
D4
SLC -96
DDS: Frame
ESF
CEPT
Superframe: D4
Superframe: D4-Japanese
Superframe: DDS
Extended Superframe (ESF)
CEPT: Basic Frame
CEPT: Signaling Multiframe
Yellow alarm or the remote frame alarm (FRM_SR1 bit 0). This alarm is an indication that the line remote end
is in a loss of frame alignment state. Indication of remote frame alarm (commonly referred to as a yellow alarm)
as for the different framing formats is shown in Table 27.
Blue alarm or the alarm indication signal (AIS). The alarm indication signal (AIS), sometimes referred to as the
blue alarm, is an indication that the remote end is out-of-service. Detection of an incoming alarm indication signal
is defined in Table 29.
Framing Format
Framing Format
2 errored frame bits (F
2 errored F
2 errored frame bits (F
2 errored F
3 errored frame bits (F
2 errored F
checksums within a one second interval if loss of frame alignment due to excessive CRC-6
errors is enabled in FRM_PR9.
Three consecutive incorrect FAS patterns or three consecutive incorrect NOT FAS patterns;
or optionally, greater than 914 received CRC-4 checksum errors in a one second interval if
loss of frame alignment due to excessive CRC-6 errors is enabled in FRM_PR9.
T
T
E
Bit 2 of all time slots in the 0 state.
The twelfth (12th) framing bit in the 1 state in two out of three consecutive super-
frames.
Bit 6 of time slot 24 in the 0 state.
An alternating pattern of eight ones followed by eight 0s in the ESF data link.
Bit 3 of the NOT FAS frame in the 1 state in three consecutive frames.
Bit 6 of the time slot 16 signaling frame in the 1 state.
Number of Errored Framing Bits That Will Cause a Red Alarm
bits out of 4 consecutive F
bits out of 4 consecutive F
bits out of 4 consecutive F
T
T
T
or F
or F
or F
(Loss of Frame Alignment) Condition
S
S
S
(continued)
) out of 4 consecutive frame bits if FRM_PR10 bit 2 = 1.
) out of 4 consecutive frame bits if FRM_PR10 bit 2 = 1.
) or channel 24 FAS pattern out of 12 consecutive frame bits.
Remote Frame Alarm Format
T
T
E
bits if PRM_PR10 bit 2 = 0.
bits if FRM_PR10 bit 2 = 0.
bits or, optionally, 320 or more CRC6 errored
Preliminary Data Sheet
Lucent Technologies Inc.
Lucent Technologies Inc.
October 2000