Specifications

T1 CSU/DSU

3. CHANNEL SEND TIMING:

A. LOOP 1 (Terminal Timing) ........................................S1-5: ON

B. LOOP 2 (Send Timing) ...............................................S1-5: OFF

4. CHANNEL TIMING:

A. NORMAL.......................................................................S1-6: ON

B. INVERTED ....................................................................S1-6: OFF

5. CHANNEL DATA:

A. NORMAL ......................................................................S1-7: 0N

B. INVERTED ....................................................................S1-7: OFF

6. REQUEST TO SEND CONTROL

A. ALWAYS ON ..................................................................S1-8: ON

B. CONTROLLED .............................................................S1-8: OFF

7. AGGREGATE TIMING SELECTION:

A. INTERNAL (MASTER) CRYSTAL TIMING........................S1-9: ON

S1-1 0: ON

B. LOOP (SLAVE) TIMING......................................................S1-9: OFF

S1-1 0: ON

C. EXTERNAL CHANNEL TIMING (NOTE 1 ).....................S1-9: ON

S1-1 0: OFF

D. INTERNAL (MASTER) CRYSTAL TIMING .......................S1-9: OFF

S1-10: OFF

NOTE

If the EXTERNAL CHANNEL TIMING

selection is made, then the associated

CHANNEL SEND TIMING must be set to Loop

1 Timing. When operating in this mode, the

DCE provides the network timing.