Please contact me off list. I have problems with our equipment on these two ATT netblocks communicating between one another.
AT&T Services, Inc. ATT (NET-12-0-0-0-1) 12.0.0.0 - 12.255.255.255
CFWN Pool ATTCT-NMPL20 ATTW-042909163717 (NET-12-88-176-0-1) 12.88.176.0 - 12.88.191.255
and
NetRange: 108.192.0.0 - 108.255.255.255
CIDR: 108.192.0.0/10
OriginAS: AS7132
NetName: SBCIS-SBIS