Atec Agilent-J2300E - Manual (Page 57)

57
BERT
(Bit Error Ratio Testing)
On many occasions problems on the network can often be attributed to the
transmission medium. Although the physical medium may be good for normal
data transmission, it may not be able to handle high-speed WAN data. That is
why the Advisor WAN has a powerful, built-in BERT (bit error ratio tester).
BERT Specifications for T1, E1, ISDN PRI T1 and E1, DS3, E3, HSSI, ISDN BRI
S/T/U, DDS 4-Wire, V-Series and High Speed V-Series
Transmit and receive framed and unframed bit patterns over single fractional
or full bandwidth channels for T1, E1, DS3, E3, ISDN primary rate interface
(PRI) T1 and E1, basic rate interface (BRI) S/T/U:
• B1 or B2 at 56 or 64 kb/s point-to-point B1 + B2 at 112 or 128 kb/s
• point-to-point
• B1 with B2 looped full duplex
• B2 with B1 looped full duplex
• Patterns:
PRBS: 63, 511, 2047, 4095 2 15 , 2 20 , 2 23
3 in 24, 1 in 8 (1:7), 2 in 8
all 1’s, all 0’s, 1010...(1:1)
DDS1, DDS2, DDS3N, DDS4N, DDS5N, DDS6N, DDS3R, DDS5R,
DDS V54LPDN, DDS/V54LPUP, OCT53, OCT54, OCT55, OCT55V2,
OCT72, OCT96, OCT120, and user defined patterns up to 996 bytes in hex
or text
4000 byte user defined pattern (Only supported in the new modules E1/T1
J2294D, J2296D, J2298D, J4646A, J4647A, J4648A, J4649A, E3/T3 J3759A/B and
HSSI J3762B)
Standard pattern exception for E1:
2 23 and 2 15 inverted per ITU-T O.151, 2 20 (ITU-T O.153
• Block length:
511 bits, 1000 bits, 2047 bits
• Duration:
10 5 through 10 9 bits
5, 10, 15 min.; 1, 4, 12, 24 hrs.; continuous
• Data rate:
User definable from 50 b/s to 2.048 Mb/s
• Error insert rate:
10 2 through 10 7 or single error
• Error insert type:
Frame, Logic, BPV (Frame and BPV on T1 interface only)
• BERT results include:
Bit and block count
Bit and block errors
Bit error ratio
Errored second
Error free seconds
Percent error free seconds
• Log Results:
Disk
• G.821 statistics — both in quantity and in percentage:
Available time
Errored seconds
Degraded minutes
Severely errored seconds
Unavailable time
Notes: BERT results can be logged at user-defined intervals and duration with
each log entry carrying a real-time stamp with 100 ns resolution.
T1 standard loopback commands are generated and processed to simulate a
CSU (channel service unit).