T1/E1 Interface Module with VComp Bundles Overview
You can use both full and fractional T1 and E1 interface modules
with voice compression modules to interconnect PBX voice switches
over the IP/MPLS network.
T1 interfaces use channel-associated signaling (CAS). You can
enable or disable CAS on T1 interfaces. E1 interfaces can use either
CAS or common channel signaling (CCS).
- With CCS, signaling information is transmitted on a separate
channel from the data, and the signaling channel controls multiple
data channels.
- With CAS, also known as per-trunk signaling (PTS), routing
information is used to direct the payload of voice or data to its
destination. The routing information is encoded and transmitted in
the same channel as the payload itself.
Published: 2010-10-27