Can anyone validate the following?

DS1 Formatter
p/n MC263xx
Supports only AMI/D4 SF, requires a CSU

PRI
p/n MC270xx
Supports ESF B8ZS, integrated CSU

What is the "Universal Formatter"?
Is this an 'enhanced' DS1 that does support ESF and B8ZS?

Thanks in advance!

The T-1 DS1 will handle AMI/D4 up to 24 channels

The PRI Will only support ESF/B8ZS

I would use a CSU on both cards