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37
5.3 BIT ERROR RATE (V.52) DIAGNOSTICS
The NetLink-T1™ offers three V.52 Bit Error Rate (BER) test pat-
terns. These test patterns may be invoked along with the LAL and
RDL tests to evaluate the unit(s) and the communication links.
When a 511, 2047, or QRSS test is invoked, the NetLink-T1™
generates a pseudo-random bit pattern of 511 bits, 2047 bits or 2
20
bits,
respectively, using a mathematical polynomial. The receiving NetLink-
T1™ then decodes the received bits using the same polynomial. If the
received bits match the agreed upon pseudo-random pattern, then the
NetLink-T1™(s) and the communication link(s) are functioning properly.
511 Initiates a built-in 511 bit pseudo-random
pattern generator and detector.
2047 Initiates a built-in 2047 bit pseudo-random
pattern generator and detector.
QRSS Initiates a built-in 2
20
bit pseudo-random
pattern generator and detector.
To perform a V.52 test, follow these steps:
1. Activate the local loopback or remote loopback diagnostic.
2. Activate the test pattern. This may be done in one of two
ways:
a. Enter
Test Pattern from the System
Diagnostics/Statistics menu and toggle the <Spacebar>
until the desired test pattern appears.
b. One of two result codes will appear to the right of the
Test Pattern listing:
OK Indicates that the received test pattern is error-free.
BE Indicates that there are errors in the test pattern (to
deliberately insert errors in the pattern, toggle
Error Insertion to ON).
c
d
c
38
APPENDIX A
PATTON NETLINK-T1 MODEL 2710
SPECIFICATIONS
WAN Speed: 1.544 Mbps
WAN Connection: RJ-48C
Nominal Impedance: 100 Ohms
DTE Interface: Integral V.35, M/34 mal
Line Coding: AMI/B8ZS
Line Framing D4/ESF/Unframed
Receive LBO: Automatic
Transmit LBO: Selectable - 0, 7.5,
15, or 22.5 dB, plus DSX-1
Clock Options: Internal, external or network clock
Diagnostics: Responds to CO-initiated D4 loopup
and loopdown codes, ESF line loop
and payload loop FDL messages,
Universal
Loopback De-activate message
Standards: AT&T TR62411, TR54016, ANSI T1.403
Power Supply: 120VAC, 60 Hz to 5VDC 300mA wall-
mount transformer or UI 100-240VAC,
50 Hz to 5 VDC, 3A wall-mount trans-
former
Dimensions: 3.5”L x 2.1”W x 0.78”H (9.0 x 5.3 x 1.9
cm)