Voice Gateway migration

[fadhel shams]

Customer needs to migrate from 2951 to isr4431 voice gateway with same configuration. 

Please let me know the best practice to migrate the voice gateway and what changes that needs to be made. 

[Nithin Eluvathingal]

Configure the new gateway add the new gateway/trunk on cucm. Once ready move the pstn line  to new gateway 

Few commands like network clocking has some changes compared to the isr 2900

Refer the below guide https://www.cisco.com/c/en/us/td/docs/routers/access/4400/feature/guide/isr4400netclock.html

[fadhel shams]

clock timezone GMT 3 0
network-clock-participate wic 0 
network-clock-participate wic 1 
network-clock-participate wic 2 
network-clock-select 1 E1 0/0/0
network-clock-select 2 E1 0/1/0
network-clock-select 3 E1 0/1/1
network-clock-select 4 E1 0/1/2
network-clock-select 5 E1 0/1/3
!
!

this is the time synchronization in the current router. Any advise on how to proceed with this ?  

[Roger Kallberg]

Please read the link shared by @Nithin Eluvathingal. It outlines the differences for clocking between the two platforms.

[b.winter]

Hi,
nobody can give you a complete answer. That depends on which features, interface cards, ISDN connection yes/no, ... you are currently using on your 2951 router.