Verilink DCSU 2911 (880-502647-001) Product Manual - Manual (Page 37)

DCSU T1 Craft Interface
Verilink DCSU 2911 User Manual 3-15
To access the Performance/Status Menu from the Main Menu,
enter P.
Figure 3-8 DCSU 2911 Performance/Status Menu
Counter Submenu From the Performance/Status Menu, the Counter Menu is
displayed by typing the command C.
Figure 3-9 DCSU 2911 Counter Menu
This menu displays counts for the following:
• Bipolar Violations (BPV): A violation of the T1 bipolar alternate
mark inversion transmission pattern in which consecutive
ones (pulses) are erroneously transmitted as pulses of like
polarities. Bipolar violations normally indicate transmission
errors.
• Frame Bit Error (FE): An error in the received framing bit
pattern and the number of whole seconds in which a framing
bit error has occurred.
• Extended Superframe Format (ESF): This is the AT&T T1
framing standard that provides frame synchronization, cyclic
redundancy check, data checking, and link bits. This counter
is only available in ESF mode.
• Cyclic Redundancy Check (CRC): An error-checking algorithm
performed on data transmissions. On a frame-by-frame basis,
a numerical value is derived from the data in the bit stream at
one end of transmission. When each frame reaches the receive
-- DCSU 2911 PERFORMANCE/STATUS MENU --
PORT 1 PORT 2 PORT 3 PORT 4
LOS NO YES YES YES
LOF NO YES YES YES
AIS Rx/Tx NO/NO NO/NO NO/NO NO/NO
RAI Rx/Tx NO/NO NO/YES NO/YES NO/YES
SLIP NO NO NO NO
CRC6 NO NO NO NO
BER NO NO NO NO
CGA NO YES YES YES
C) display counters P) display performance data
T) threshold status X) exit this screen
[1,1] DCSU 2911 >
-- DCSU 2911 COUNTER MENU --
BPV FE ESF CRC
PORT 1 255 0 0 0
PORT 2 255 0 0 0
PORT 3 45 64 0 0
PORT 4 46 65 0 0
Rn) Reset counters X) exit this screen
[1,1] DCSU 2911 >