T1 CAS Protocol

Parameter group

Channel Group

Access level

Admin

Possible values

E&M
FXS
DID
SAS

Defaults

E&M

Explanation

Specifies the T1 channel associated signaling (CAS) protocol that is used by channels in this group. This parameter is not used with common channel signaling (CCS).

Note: Select E&M instead of DID when the Call Information Type parameter is set to Register. DirectTalk DID is the same signaling protocol as E&M. The DID value is retained only for compatibility with previous releases.