Cisco NIM-4SHDSL-EA=

NIM with multimode 4 pair G.SHDSL EFM an

Product Overview

Designed to deliver high-speed Ethernet services over Symmetrical High-speed DSL (SHDSL) access, the multimode G.SHDSL NIM (Figure 1) offers symmetric data rates over one to four pairs of copper wire and supports both EFM and ATM modes. To achieve higher bandwidths, bonding of multiple pairs (4-wire, m-pair, inverse multiplexing over EFM bonding) is supported.

In EFM mode, the multimode G.SHDSL NIM allows bonding, as defined by IEEE 802.3ah, and is typically used in scenarios where individual links are aggregated using the 802.3ah loop aggregation. Depending on the number of wire pairs in service, the maximum data rate is 61.4 Mbps, with each line supporting up to 15 Mbps with 128-TCPAM. The NIM complies with the 2BASE-TL standard, which is based on the IEEE 802.3ah EFM standard. The 2BASE-TL standard uses the technology standard defined in ITU recommendation G.991.2 (G.SHDSL.).

In ATM mode, the multimode G.SHDSL NIM allows bonding of multiple pairs up to four pairs (8-wire) with increased bandwidth by using data interleaving and m-pair mode. In m-pair mode, the multimode four-pair G.SHDSL NIM offers data rates up to 5.7 Mbps per pair and up to 22.7 Mbps over four pairs. (See Table 2 for the data rates supported by the multimode four-pair G.SHDSL NIM (NIM-4SHDSL-EA) under different modes.)

The multimode four-pair G.SHDSL NIM cost-effectively allows service providers and enterprise customers to deliver Ethernet services to sites with no access to fiber by using bonded copper pairs with symmetrical bandwidth. These rates cover applications traditionally served by High-data-rate DSL (HDSL), Single-line DSL (SDSL), T1, E1, and services beyond E1.

The multimode four-pair G.SHDSL NIM, together with the ISR 4000 series router, provides businesses the necessary bandwidth for critical traffic such as voice and videoconferencing and enables customers to save money by integrating voice and data traffic on the same WAN link.

• Complies with standard, based on ITU recommendation G.991.2
• Supports G.SHDSL Annexes A (U.S. signaling) and B (European signaling)
• Supports Annexes F and G
• Supports ATM or EFM modes (one mode at a time)
• Offers symmetrical WAN speeds up to 1 x 2304 kbps over single copper pair, up to 2 x 2304 kbps over two copper pairs, up to 3 x 2304 kbps over three copper pairs, and up to 4 x 2304 kbps over four copper pairs using ITU-T G.991.2 annexes A and B
• Offers symmetrical WAN speeds up to 1 x 5696 kbps over single copper pair, up to 2 x 5696 kbps over two copper pairs, up to 3 x 5696 kbps over three copper pairs, and up to 4 x 5696 kbps over four copper pairs using ITU-T G.991.2 annexes F and G
• Supports EFM bonding; supports bonding of up to four SHDSL pairs
• In ATM mode, supports maximum of eight Permanent Virtual Circuits (PVCs)
• Supports dying gasp and wetting current
• Supports point-to-point configuration