Chapter 2. System Features
(CPC-B Version 4.0 or higher)
Technical Manuals Online! - http://www.tech-man.com
The Tl Interface is a digital trunk card that provides twenty-four 64 kbps
channels, for a total transmission rate of 1.544 Mbps. Tl lines can be leased
from local exchange carriers and long-distance carriers.
The DBS Tl Interface supports the following options:
SF or ESF Framing Formats
Either super frame (SF) or extended super frame (ESF) formats can be used
with the DBS Tl.
The superframe consists of 12 frames, with each frame including 193 bits.
Each frame is separated by a framing bit.
super frame consists of 24 frames, double the length of the super
frame (SF) format. ESF also supports monitoring and maintenance
capabilities that are not available with the SF format.
Flexible Trunk Signaling Modes
The Tl Interface provides the following punk signaling modes. The
signaling modes can be assigned on a per-channel basis:
FF2 (Trunks): Trunk Type
FF2 (Trunks): Trunk Port Class
FF3 (Extension): Station Port Class
The following hardware is required to install a Tl in a single cabinet:
Section 700 - Operation