The Cisco® Channelized T1/E1 and ISDN PRI High-Speed WAN Modules combine multiple T1/E1 WAN connectivity-Channelized T1/E1 and ISDN Primary Rate Interface (PRI), in the same card. Applications include fractional or full T1/E1 WAN connectivity, ISDN PRI for primary WAN link or WAN backup, and dial access aggregation. With flexible WAN connectivity options, together with integrated routing, security, voice, and wireless capabilities, the Cisco Integrated Services Routers can meet every need of enterprise-class branch offices today and in the future. Three versions are available, 1- and 2-port cards (Figure 1) in a single-wide high-speed WAN interface card (HWIC), and a 8-port cards (Figure 2) in a single-wide network module. The different versions help enable customers to deploy different port densities according to the needs of individual offices.
The modules can be used in T1 or E1 networks, selectable by software configuration. The integrated channel service unit/data service unit (CSU/DSU) function allows customers to consolidate customer premises equipment (CPE). The modules support balanced and unbalanced E1 connectivity and conform to the G.703 and G.704 standards for unframed and framed E1 modes. The Channelized T1/E1 and ISDN PRI modules work with the digital modem module in the Cisco 2800, 2900, 3800, and 3900 Series Integrated Services Routers to provide V.90- and V.92-compliant digital dial access aggregation.
The 1- and 2-port Channelized T1/E1 and ISDN PRI HWICs are updated versions of the E1/T1 ISDN PRI network modules, with the same functions and performance in a compact form factor of HWIC. You can save the network module slots for other LAN/WAN connectivity, and your deployment flexibility is greatly enhanced.
Figure 1. 1- and 2-Port Channelized T1/E1 and ISDN PRI High-Speed WAN Interface Card
Figure 2. 8-Port Channelized T1/E1 and ISDN PRI Network Module
Features and Benefits
• 1, 2, or 8 ports of RJ-48
• Cisco IOS® Software configurable for T1 or E1 operation
• Integrated CSU/DSU per port
• Fractional T1/E1 (n x DS-0) or full T1/E1
• Balanced or unbalanced E1 termination in the same module
• E1 unframed and framed modes (G.703 or G.704)
• Interoperable with Cisco digital modem modules PVDM2-12DM, PVDM2-24DM, and PVDM2-36DM (HWIC-1CE1T1-PRI and HWIC-2CE1T1-PRI modules only)
• Support for Multilink Point-to-Point Protocol (PPP) and Multilink Frame Relay (FRF.16)
• PRI for data
The Cisco E1/T1 ISDN PRI HWICs 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. Table 1 lists available cable adaptors.
Support for G.703 Unstructured E1 Signaling
ITU signaling standard G.703 was previously available only on Cisco midrange routers through the voice/WAN interface card (VWIC-xFT-G703), which did not support data PRI. Framed E1 (G.704) is also supported for international customers without G.703 service.
Increased Manageability and Troubleshooting
Critical loopback support makes the Cisco Channnelized T1/E1 and ISDN PRI Modules easy to manage. Both models can internally loop back the onboard framer chip toward the interface, thus eliminating the need for an external loopback plug. Local, remote, line, and payload loopbacks, complement the management features of the Cisco Channelized T1/E1 and ISDN PRI Module.
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.
Table 1 lists the product numbers of the Cisco Channelized T1/E1 ISDN PRI Modules and the cables for balanced and unbalanced E1.
Table 1. Product Numbers of the Cisco Channelized T1/E1 and ISDN PRI Modules and Cables
1 Port Channelized T1/E1 and ISDN PRI High Speed WAN Interface Card
2 Port Channelized T1/E1 and ISDN PRI High Speed WAN Interface Card
8 Port Channelized T1/E1 and ISDN PRI Network Module
Network Module Adapter for SM Slot on Cisco 2900 and 3900 Series ISR
E1 Cable RJ-45 to Dual BNC (Unbalanced)
Refer to the software release notes or the Cisco IOS Software Upgrade Planner, or ask your local Cisco representative for information about supported platforms and minimum software and memory requirements. Table 2 shows the minimum Cisco IOS Software requirements for each platform.
Table 2. Minimum Cisco IOS Software Requirements
2800, and 3800 Series
2900, and 3925, 3945
Cisco 3925E, 3945E
Minimum IOS Release
Minimum IOS Technology Package
Table 3 shows the platform support and maximum number of Cisco Channelized T1/E1 and ISDN PRI Modules supported in each platform.
Table 3. Number of Cisco Channelized T1/E1 and ISDN PRI Modules per Platform
When installed in a Cisco 1900, 2800, 2900, 3800 or 3900 Series Router, the 1- and 2-port Channelized T1/E1 and ISDN PRI HWICs and 8-port Channelized T1/E1 and ISDN PRI network module do not change the standards (safety, EMC, telecom, network homologation, power, environmental requirements, and regulatory approvals) of the router itself. Refer to the Cisco 1900, 2800, 2900, 3800 and 3900 Series data sheets for additional information about mechanical, environmental, and agency certifications.
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