Programming instructions

PROGRAMMING FOR THE OPTIONAL T1 AND ISDN (T1/PRI) CARDS DX-120 Programming Manual
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Programming for a T1 Card via PC-DBA (continued)
1) Go to ProgrammingXC.O. Line ApplicationXT1 Card to display the C.O. Line Application—T1 Card
screen.
2) Select information for the fields as described below.
T1 CARD PROGRAMMING FIELDS
IN THIS FIELD SELECT...
General Setting
Frame Type
•SF (i.e., Super Frame) - default*
The standard T1 mode consists of 12 frames per superframe cycle. The first frame bit
remains constant and rotates through the 12-bit pattern. By identifying the frame pat-
tern, the system can select the sixth and twelfth frame for the AB bit signalling inband
method. T1 parameters allow for 24 64-Kbit user channels.
IMPORTANT!
If you are programming for ISDN (T1/PRI) and not T1, be sure to leave this
setting at SF.
• ESF (i.e., Extended Super Frame)
This setting consists of 24 frames. The frame bit uses only 6 frames leaving 18 bits for
other purposes (i.e., 6 bits for CRC information, and 12 bits for a facility data link).
T1 Card Programming Fields (continued on next page)