All contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 16 of 21
Cisco AS5850 CT3 Termination Card
The Cisco AS5850 provides the CT3 interface for high-density PSTN connectivity. This card provides a maximum of 672 channels
through a single CT3 connection. It is valuable to any customer who wishes to reduce the number of cables required to deliver 672
channels and take advantage of lower tariffs associated with purchasing a single CT3 circuit versus 28 individual T1 circuits. The CT3 card
provides standards-based M13 multiplexer capability in conjunction with local High-Level Data Link Control (HDLC) or distributed DSP
resources to fully terminate up to 28 T1 interfaces. The CT3 card also includes a channel service unit (CSU) for terminating a CT3 trunk
directly from the telco network. This card also terminates 216 user connections through onboard DSP resources (as part of the overall DSP
pool) and 256 user ISDN connections through onboard HDLC controllers (Figure 3).
Figure 3. Cisco AS5850 CT3 Termination Card
Configuration of any T1 interface contained within the CT3 interface can be provisioned independently of other CT1 interfaces included
within the same CT3 facility. Therefore, users can software configure the CT3 card to carry ISDN PRI trunks (each connected to a different
switch type), IMTs, and a variety of North American robbed-bit signaling (RBS) types such as Loop Start and Ground Start, all on the
same Cisco AS5850 Universal Gateway platform.
Following is a brief description of the CT3 interface type and PRI/T1 trunk types supported:
●
T3 (44,736-Mbps) links default to binary three-zero substitution (B3ZS) line encoding and C-bit framing. Physical connection to a
T3 circuit is provided on two standard 75-ohm, unbalanced, female BNC connectors.
●
T1/PRI (1.544-Mbps) links are supported as described in the following section on the 24-port E1/T1 card. Ear-and-mouth (E&M),
Loop-Start, and Ground-Start links are all supported.
●
Universal access (analog modem or digital data and voice calls) is supported when an individual 1.544-Mbps interface contained
within the CT3 circuit is configured for ISDN PRI signaling. PRI signaling is available on all 1.544-Mbps trunks. Up to a
maximum of 256 individual B channels may be terminated through the CT3 integrated HDLC controllers and full ISDN capacity
supported with DSP resources.
●
Nonintrusive monitoring of individual T1/PRI signals is available at the front of the CT3 card through standard 100-ohm bantam
jacks.
(32 páginas)
(5 páginas)
(11 páginas)
(130 páginas)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentários a estes Manuais