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Ringing Length (A) 
  -  The measured time duration of the first Ring 
Burst.
Preseize Time (B) 
  -  The measured time period between the first 
Ring Burst and Channel Seizure.
Twist
 
  -  The ratio of the received Mark and Space 
signal levels.
Seizure Bits
 
  -  The number of bits received during the 
Channel Seizure (C) period.
Mark Time (D) 
  - The measured duration of the Mark period.
Postseize Time (F) 
  -  The measured time duration between the Data 
Packet (E) and the Second Ring Burst (G).
A B DC E F G
Tip/Ring
1st Ring 
 
Burst
Channel 
Seizure
Mark
Data 
Packet
2nd Ring 
Burst
Press the [Enter] key to return to the previous screen 
or press the [Tab] key to view the Caller ID Raw 
Data screen.
This screen displays a hexadecimal dump of all data 
in the Caller ID packet. This data may be used for 
analyzing compatibility problems between the Caller 
ID format implemented by the switch and the format 
implemented by the customer equipment.
Press the [Enter] key to return to the previous screen.