Clock Source Internal on ISR Router for Voice T1

[mzajeski]

We are replacing a 28XX router with a new ISR 4431.

Our old router has the following for it's voice stuff - 

no network-clock-participate slot 1
network-clock-participate wic 0
network-clock-participate wic 1
network-clock-participate wic 2
network-clock-participate wic 3
network-clock-select 1 T1 0/2/0

controller T1 0/0/0
framing esf
linecode b8zs
channel-group 0 timeslots 1-24
description Cimco MPLS Circuit
!

controller T1 0/1/1
framing sf
clock source internal
linecode ami
ds0-group 1 timeslots 1-24 type e&m-immediate-start

controller T1 0/2/0
framing esf
linecode b8zs
pri-group timeslots 1-24
description COMCAST PRI - ADTRAN PORT 1.

We need to basically mirror the configuration of all circuits to the new 4431.  The issue is that we cannot configure "clock source internal" on our T1 0/1/1 anymore since the ISR only supports that on Channel-Groups and Pri-Groups.  Why did they take this out and does anyone have the configuration answer that will keep my 0/1/1 from getting a crap-ton of slips and violations?

Thanks in advance!!!!

[Mohammed Khan]

For internal clock try below config
controller E1 0/1/0
 framing no-crc4
 clock source network
 pri-group timeslots 1-31

network-clock synchronization automatic

[mzajeski]

Its a T1 PRI, but we can try clock source network.  What is the difference between network and internal?

[Mohammed Khan]

Per below link

http://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/software/configuration/guide/ConfT1E1NIM.html

internal—Sets the controller framer as the clock master.

The clock source internal command is only applicable with the channel-group command and the pri-group (for data) command.
Note The pri-group command is supported on the NIM-xCE1T1-PRI for data without the keyword voice-dsp.

line—Specifies the phase-locked loop (PLL) on a port. When both a primary port and a secondary port are configured and the primary port fails, the PLL switches over to the secondary. When the PLL on the primary port becomes active again, the PLL automatically switches to the primary port.

network—Sets the controller to sync to the TDMSW clock for both TDM voice and data support. This configures the far end of the T1/E1 line as the clock line.

[Nadeem Ahmed]

In ISR 4431 this configuration changed, meaning that the the network clock participate was replaced by  network-clock synchronization automatic and network clock select by network-clock input-source priority controller [t1|e1] slot/bay/port.

In case you don't want use above command then you can use clock source network under the controller.Also the clock source internal is for Data in this family 4000 ISR


refer below doc.

 http://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/software/configuration/guide/ConfT1E1NIM.html

http://www.cisco.com/c/en/us/td/docs/routers/access/4400/feature/guide/isr4400netclock.html
 
 https://supportforums.cisco.com/discussion/12508721/isr-4451-voice-configuration