1.544M - An analog 1.544 MHz signal
2M - An analog 2.048 MHz signal
6.312M - An analog 6.312 MHz signal
E1 CAS - A digital E1 2 Mb signal with Common Associative Signaling
T1 D4 - A T1 signal with D4 format
T1 ESF - A T1 signal with Extended Super Frame format
T1 PULSE - Used for testing the T1 signal mask and should not be used for normal operation
CC - A Composite Clock signal
JCC - A Japanese Composite Clock signal
JCC4 - A Japan Composite Clock signal with 400 Hz
8K - An analog 8 kHz signal