Cisco Systems C892FSPK9 manual Connecting a Data BRI Port, Inches 66 dB 2100, 3G-ACC-TS9-TNC

Chapter 3 Connecting the Router

Connecting a Data BRI Port

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

Note Antenna orientation can increase or decrease signal reception due to polarization. Typically, an SP’s transmitting antenna on the BTS is a vertically polarized omnidirectional antenna, which means the electromagnetic waves are transmitted from it in a vertical plane. Hence, the receiving antenna needs to be vertically oriented too in order to receive the best signal. As the angle of the antenna orientation is changed from vertical to horizontal, only an angular component of the signal is picked up by the antenna. Therefore, if the antenna orientation is horizontal, the antenna picks up the least signal. The signal is received by the antenna as a result of it bouncing off of reflective surfaces. Hence, depending on where the antenna is placed, it may receive different signal strengths. However, the recommended position is vertical.

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 p1262730

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).

Although the following procedure shows a Cisco 888W data router, this procedure applies to all Cisco 880 series router with a Data BRI port.

	Cisco 860 Series, Cisco 880 Series, and Cisco 890 Series Integrated Services Routers Hardware Installation Guide
OL-16215-11		3-21