12
V.35 SINGLE FIBER DRIVERS
S1-5 and S1-6: Clock Source
Switches S1-5 and S1-6 are set in combination to determine the source of the
transmit clock.
S1-5
S1-6
Setting
Off
Off
Received Recover Clock
On
Off
Internal Clock
Off
On
External Clock
On
On
Internal Clock
S1-7: DTE Control of RDL
The setting for switch S1-7 determines whether DTE control of remote digital
loopback test is enabled or disabled. If DTE control is disabled, the RDL test
can only be initiated by the front-panel switch.
If DTE control is not available, switch S1-7 should be set to off.
S1-7
Setting
On
DTE control of RDL enabled
Off
DTE control of RDL disabled
S1-8: DTE Control of LAL
The setting for switch S1-8 determines whether DTE control of local analog
loopback test is enabled or disabled. If DTE control is disabled, the LAL test
can only be initiated by the front-panel switch.
If DTE control is not available, switch S1-8 should be set to off.
S1-8
Setting
On
DTE control of LAL enabled
Off
DTE control of LAL disabled
