AMERITECH AM8a, Instruction Manual

Page: 123 / 152

Technical Specifications (18-0037) AM8a Instruction Manual
February 10, 2000 0037-S08.L_
8-8
PCM1 and PCM2 (T1 and SLC®96) METER MEASUREMENTS
Measurements are derived from the decoding of the
PCM
bit-stream.
Transmission Errors
BPV: Bipolar Violations: displayed count for every 64
BPV
(64, 128, …)
FERR: Frame errors: displayed count for every 4
FERR
(4, 8, …)
CRC: Cyclic Redundancy Check: Calculated for
ESF
framing mode
SLIPS: Counts insertion or deletion of data bits in data stream.
ALARMS: Counts
YELLOW
and
BLUE
alarms.
Indicates "yes" or "no" occurrence of
YELLOW
and
BLUE
alarms.
Frame Synchronization
TX, RX: Shows phase relationship on dual bar graphs
Signaling Bits
TX, RX Shows a and b signaling bits for each of 24 TX and RX channels
Channel Noise and Tone Measurements
TX, RX Noise and Tone measurements on each of 24 channels; see "Noise
(Analog or Selected
PCM
Channel)" and "Tone (Analog or
Selected
PCM
Channel)" on previous page.
SLC®96 Alarm Conditions
TX, RX Display of "flags" for A through D shelf/ lines, and power
SLC®96 Protection Status
TX, RX 4-bit display which "decodes" to indicate status
SLC®96 Maintenance Message
TX, RX Display of "flags" to indicate presence or absence of messages and
indicates Channel Number and Time Slot.