Cisco Cisco 1800 2800 3800 Series 9-Port EtherSwitch High-Speed WIC

Antenna Guide for ISR and CGR with Verizon Wireless 4G LTE

7. A single antenna is connected, and that antenna connected to the M1/DIV port instead of the M0/MAIN

port. An LTE connection will usually not be made. Both antennas should be installed.

8. A single antenna is connected to M0/MAIN port (no antenna connected to M1/DIV port). This will affect

downlink performance. Both antennas should be installed.

9. The antennas are not securely tightened. The antennas may not remain vertical (the appropriate position for

a dipole) or the loose connection will yield intermittent or lower signal quality all connectors should be tight.

10. Both antennas are directly connected to the ISR. This may reduce LTE performance of the ISR. At least one

antenna should be connected via an extension cable (supplied) and antennas separated by 18 inches.

11. Antennas not positioned for optimal reception. Antennas should be placed outside any metal or thick walled

(concrete, brick, etc.) enclosure, preferably either close to a window or on a higher floor (e.g. not in a

basement). The appropriate antenna installation guide should be reviewed and followed (see next item).

12. The Cisco antenna was not installed as recommended. Please see the following installation guides:

www.cisco.com/c/en/us/td/docs/routers/access/interfaces/ic/hardware/installation/guide/EHWIC-4G-LTEHW.html

www.cisco.com/c/en/us/td/docs/routers/connectedgrid/antennas/installing/cg_antenna_install_guide/Overview.html

www.cisco.com/c/en/us/td/docs/routers/access/interfaces/NIM/hardware/installation/guide/4GLTENIM_HIG.html

13. Antennas used are not 4G-compatible or are non-Cisco. It is possible to obtain reception with 3G antennas or

non-Cisco 3G/4G antennas, but the signal strength and/or quality may not be sufficient for a high performing

4G environment. Additionally, 3G and non-Cisco antennas are not supported by Cisco for 4G deployment.

14. The signal strength or quality is insufficient. Please see the next section.

15. Everything seems correct, and still cannot get an LTE connection, or the LTE performance is unacceptable.

Gather the following and open a Cisco TAC services request.

Brief summary of the design or test setup, List of the issues. The following ISR console output:

term len 0

sh flash

sh ver

sh run

sh ip int brief

sh ip route

sh line

sh dialer

sh int cell 0/x/0

sh cell 0/x/0 all

sh cell 0/x/0 rad hist all

(find x from "sh ip int brief" or just 0 for 819)

debug chat

debug dialer

, (wait a few minutes),

undebug all

sh log

sh controller cell 0/x/0

(find x from "sh ip int brief" or just 0 for 819),

term len 24