Multi-Tech Systems MVP-2410 ユーザーズマニュアル

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Receive 
Timeslot 16 
Loss of 
MultiFrame 
Alignment 

 

The framing pattern '0000' in 2 
consecutive CAS multiframes were not 
found or in all time slot 16 of the previous 
multiframe all bits were reset. 

 

Transmit 
Line Open 

 

At least 32 consecutive zeroes were 
transmitted. 

Transmit 
Data 
Underrun 

 

For use by MTS Technical Support 
Personnel. 

Transmit 
Slip 
Negative 

 

The frequency of the transmit clock is 
greater than the frequency of the transmit 
system interface working clock.  A frame 
is skipped. 

Bipolar 
Violation 

Integer tally of 
violation count 
since last reset. 

Bipolar Violation (or BPV) refers to two 
successive pulses of the same polarity on 
the E1 line.  On an AMI-encoded line, this 
represents a line error.  On a B8ZS line, 
this may represent the substitution for a 
string of 8 zeroes. 

Excessive 
Zeroes 

Tally since last 
reset. 

Displayed value will increment if 
consecutive zeroes beyond a set threshold 
are detected.  I.e., tally increments if more 
than 7 consecutive zeroes in the received 
data stream are detected under B8ZS line 
coding, or if 15 consecutive zeroes are 
detected under AMI line coding. 

Transmit 
Slip 

Tally since last 
reset. 

Slip in transmitted data stream.  Slips 
indicate a clocking mismatch (or lack of 
synchronization) between T1/E1 devices.  
When slips occur, data may be lost or 
repeated. 

Receive Slip 

Tally since last 
reset. 

Slip in received data stream.  Slips indicate a 
clocking mismatch (or lack of synchronization) 
between T1/E1 devices. When slips occur, data 
may be lost or repeated.