How to configure network clock options on Cisco ISR series routers

Applies to:

Cisco ISR series routers 

Description:

The standard "network-clock partecipate" and "select" commands, crucial for the best Digital Fax quality, are not available on Cisco ISR series routers. 

How-to:

Please use the following commands to configure network-clock in your Cisco ISR series router:

• configure terminal

• network-clock synchronization automatic

• controller [t1|e1] slot/bay/port

• clock source line primary

• network-clock input-source priority controller [t1|e1] slot/bay/port

• exit