After Migration 11.5 to 12.5 CUC not accepting caller input

[Mk25]

Hi,

we have migrated Call Manager & Cisco Unity from 11.5 to 12.5 but after migration, i found that the Caller Input is not working.

we have changed the IP and hostnames during migration.

phone registration and calls in/out tested.

upgrade Voice Gateway (ISR 4321)

tried to use this command <dtmf-relay rtp-nte sip-kpml> but no success.

[Nithin Eluvathingal]

Before you migrated to ISR4k, what gateway type it was, H323 or SIP. what Connection you subscribed with ISP, is it a SIP or ISDN PRI ?