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Drukuj stronęSupported on Cisco 2610-51XM, 2800, 2691, 3660, 3700 and 3800 Series routers
Online insertion and removal (OIR) supported on Cisco 3660 3745 and 3845 routers
On-board expansion slot for future technologies
KEY BENEFITS
Enhanced Flexibility
The Cisco E1/T1 ISDN PRI network modules (NM-xCE1T1-PRI) are software configurable between E1 or T1 operation, balanced or unbalanced
E1 termination, and CSU/DSU. Customers no longer need to buy a specific module for T1 support and then another card for E1 connectivity. In
addition, the same modules provide for balanced (120-ohm) and unbalanced (75-ohm) E1 termination. See table 5 for available cable adaptors.
Support for G.703 Unstructured E1 Signaling
International Telecommunications Union (ITU) signaling standard G.703 was previously available only on Cisco midrange routers through the
VWIC-xFT-G703 Voice/WAN interface card, which did not support data PRI. Framed E1 (G.704) is also supported for international customers
without G.703 service.
High-Density PRI Connectivity Options
For midrange, high-density ISDN PRI applications, the Cisco 2610-51XM, 2800, 2691, 3660, 3700 and 3800 Series provide superior performance
and port density. For example, a fully configured Cisco 3745 system can be configured for up to eight ISDN PRI connections in one chassis. These
ports can be fully channelized to provide up to 192 T1 channels at 56/64 Kbps each, or 240 E1 channels at 56/64 Kbps each.
Increased Manageability and Troubleshooting
Critical loopback support makes the 1-port and 2-port Cisco E1/T1 ISDN PRI network modules easy to manage. Both models have the capability to
internally loop back the on-board framer chip towards the interface, thus eliminating the need for an external loopback plug. Local, remote, line, and
payload loopbacks, along with support for V.54 inline loop commands complement the Cisco E1/T1 ISDN PRI Network Modules' management
features.
Integrated bantam (tty) jacks allow line monitoring equipment to be inserted for circuit troubleshooting. The single set of jacks can be software
selected to monitor port-0 or port-1 without interrupting service.
Blue, yellow, and red alarm detection, as well as a new command to disable yellow alarm detection and generation, gives customers better control
over their WAN connections. This feature, combined with support for the Cisco WAN Access Performance Management System (WAPMS), Cisco
Intelligence Engine 2100, and CiscoWorks makes troubleshooting easy when necessary
Reliability
Integrating the external E1/T1 terminating device (CSU/DSU) increases the overall system reliability. Possible points of failure are reduced by
eliminating the second power supply, additional fans, extra cabling, and other equipment that accompany a "two-box" solution. This increase in
reliability allows Service Providers to more easily and cost effectively meet the requirements of their customers' Service Level Agreements (SLAs)
and provides enterprises with maximum equipment uptime.
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© 2005 Cisco Systems, Inc. All rights reserved.
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