Cisco 880 Series Guida di Installazione Scaricare il pdf (Pagina 75)

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Cisco 860 Series, Cisco 880 Series, and Cisco 890 Series Integrated Services Routers Hardware Installation Guide

OL-16193-07

Chapter 3 Connecting the Router

Connecting a Data BRI Port

For additional information on all the available cables and antennas available for 3G, go to:

http://www.cisco.com/en/US/docs/routers/access/1800/1861/software/feature/guide/mrwlsgsm.html#w

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Connecting a Data BRI Port

You can connect the Data BRI port to the ISDN service provider as a backup link to the WAN port in

case the primary xDSL (general term referring to various forms of DSL, including global industry

standard symmetrical high-speed DSL [G.SHDSL]) WAN service fails. The Data BRI connection is not

available on the third-generation (3G) models.

The cabling requirements for the ISDN S/T connection are as follows:

•

You must provide two unshielded Category 5 cables. The first cable connects the NT1 box to the

splitter, and the second cable connects the splitter to the wall jack.

•

There are RJ-45 connectors at both ends of the default orange ISDN S/T cable. However, an

RJ-45–to–RJ-11 ISDN S/T cable is available upon request if the wall jack at the site requires an

RJ-11 connector. Contact your router reseller for the appropriate cable.

Caution

Both LAN and WAN ports use RJ-45 connectors. Use caution when connecting cables to these

connectors. To avoid damage to the router, do not connect telephone-network voltage (TNV) circuits

(such as ISDN or DSL circuits) to safety extra-low voltage (SELV) circuits (such as LAN circuits).

Table 3-2 Cisco Adapter Cables for Use with 3G Fixed Routers

Cisco Product Number

Antenna Adapter

Length

Insertion Loss Frequency (MHz)

3G-ACC-SSMB-TNC 14.5 inches 0.66 dB 2100

3G-ACC-TS9-TNC 13.5 inches 0.62 dB 2100

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 111 112

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Cisco 880 Series Guida di Installazione Pagina 75