Section 311-580-20B
030-101527 Rev. B
9
0407IBRB
the craft interface port or can be retrieved remotely via TL1
commands.
Message Type
Event/Alarm Log Message
SIGNAL STATE
LOS FROM CPE
LOS FROM CPE CLEARED
LOS FROM FAC
LOS FROM FAC CLEARED
AIS FROM FAC
AIS FROM FAC CLEARED
AIS FROM CPE
AIS FROM CPE CLEARED
RAI FROM CPE
RAI FROM CPE CLEARED
LOOPBACK
REMOTE LOOP UP
ACTIVITIES
MANUAL LOOP UP
REMOTE LOOP DOWN
MANUAL LOOP DOWN
TIMEOUT LOOP DOWN
ANY LOOP UP
ANY LOOP DOWN
NIU POWER
LOSS OF POWER
STATUS
POWER UP
MAINT. RESET
RESET PM REGISTERS
ACTIVITIES
RESET EVENT/ALARM LOG
CHANGE CIRCUIT ID
PROVISIONING OPTION CHANGE
PROVISIONING
SF FRAMING SET
ANOMALIES
ESF FRAMING SET
FRAMING LOSS
Table 2. Samples of Event/Alarm Log Messages
6.5
Performance Storage Registers
The unit maintains performance parameters, Status Register
events and PIRs for both directions of transmission in 15 minute,
hourly, and daily registers as shown in Table 3.
15 Minutes
1 Hour
1 Day
Current
Current
Current
Previous
Previous
Previous
95 Additional
22 Additional
6 Additional
24 Hours Total
24 Hours Total
30 Days Total
Table 3. PM Data Storage Periods
6.6
Historical Performance Monitoring & Retrieval
Historical (30 day) PM data is provided by the unit. In the idle
or non-looped state, the DS1 bit stream (SF or ESF circuits), in
both directions of transmission, is monitored for performance
statistics. The unit records and time stamps these performance
statistics in non-volatile memory for retrieval at a later time.
These performance statistics can be retrieved on demand from
the NIU in two ways: 1) locally, and on a non-intrusive basis, via
the front-panel craft interface port or 2) remotely, via TL1 com-
mands and responses in the ESF Data Link.
6.7
PM Retrieval, SF/ESF Circuits (Craft Port)
The 3115-80 provides a front-panel RS-232 connector for local
access of performance statistics data without placing the unit
into loopback. See Paragraph 7.1.2 and Figure 10.
6.8
PM Retrieval, SF/ESF Circuits (Intrusive)
6.8.1
To access historical performance information, the test
center (Hi-Cap or CO) first accesses the circuit on a split basis,
and places the NIU in loopback. If the circuit is SF, the test con-
troller must then reconfigure for ESF framing for the duration
of the session to allow commands and responses to be exchanged
with the NIU in the ESF Data Link of the intervening facility.
6.8.2
The procedure for customer ESF circuits is identical to
SF, except the test controller does not need to change the fram-
ing format during the test session.
6.9
PM Retrieval − Inband Codes
By sending a 16-bit Query code, while the NIU is in loopback,
the unit will respond with a Bit Error Response (BER) indicat-
ing the number of Errored Seconds (ES)/Unavailable Seconds
(UAS) within the last 24 hours. The Bit Error response provides
a rough estimate on the status of the circuit. The unit will
respond to the codes shown in Table 6, within 10 seconds, with
a BER as defined Table 6.
Query
Binary
Hex
Setting
BER
CPE Errored Second
Customer to Network
1100 0110 1100 0000
C6C0
0 errored seconds
900
Customer to Network
1 to 100 errored sec.
1070
(ES-P)
101−319 errored sec.
1150
Greater than 319
1220
Greater than 319
errored seconds
1220
CPE Unavail Second
Customer to Network
1100 0110 1100 0001
C6C1
0 unavailable seconds
900
Customer to Network
1 to 100 unavail. sec.
1070
(UAS-P)
101−319 unavail. sec.
1150
Greater than 319
1220
Greater than 319
unavailable seconds
1220
FAC Errored Second
Network to Customer
1100 0110 1100 0011
C6C3
0 errored seconds
900
Network to Customer
1 to 100 errored sec.
1070
(ES-P)
101−319 errored sec.
1150
Greater than 319
1220
Greater than 319
errored seconds
1220
FAC Unavail Second
Network to Customer
1100 0110 1100 0100
C6C4
0 unavailable seconds
900
Network to Customer
1 to 100 unavail. sec.
1070
(UAS-P)
101−319 unavail. sec.
1150
Greater than 319
1220
Greater than 319
unavailable seconds
1220
Clear PM
1100 0110 1100 0101
C6C5
Clear all PM
900
Table 4. PM Retrieval - Inband Codes and BER Responses
6.10
PM Retrieval, ESF Circuits (Non-Intrusive)
6.10.1
If the Test Access Device (TAD) being used has the ca-
pability to gain splitting access only to the ESF Data Link,
performance statistics can be retrieved using TL1 commands
without affecting customer payload information. In this mode,
the unit will effectively perform a loopback" of the ESF Data
Link allowing messages to be interchanged with the test control-
ler.
