Example Of Ferrite Bead Installation And Connection Types - Mitel Inter-Tel 5000 Installation And Maintenance Manual

Chapter 5: Installation
Connecting CO Trunks to a U.S. System
Connecting CO Trunks to a U.S. System
Connect the CO trunks and other module cables. This procedure describes additional
information for installing digital endpoints. Note that step 2 mentions two installation methods.
Although the first method is more flexible, the second method can be used to minimize the
number of terminal blocks required.
1.
2.
3.
Connecting CO Trunks to a European System
Some trunks are connected using the fallback system. See "Analog Fallback System [Europe
Only]" on
Lightning Strike Protection Methods
For protecting the system against lightning strikes, attach the two ferrite split beads around each
cable just below the Amphenol-type connector, as shown in Figure 5-6 on
For additional lightning protection, install gas discharge tubes with silicon avalanche
suppressors to ground (grounding rod or copper cold water pipe) on each CO, DID, and OPX
trunk. This must be done external to the system. Each gas discharge tube is installed directly
between the telephone company (network provider) RJ-type block and the system CO/DID/OPX
input. This protection should provide energy absorption and filter low-level surge potentials.
Also, in areas with frequent occurrences of lightning, it is recommended that the cable length
between the telephone company (network provider) RJ-type blocks and the gas discharge tubes
be at least 75 ft (22.5 m). The cable may be coiled up as needed.
Page 5-26
Cross-connect the CO trunks from the telephone company RJ-type blocks to the right
side of the Inter-Tel system blocks at the MDF. To provide additional lightning protection,
see "Installing Lightning Protection" on
Use either of the following methods. To help speed installation, a 15 ft (4.5720 m) cable
with Amphenol connector is available, part no. 813.1814.
•
Replacing an Inter-Tel Axxess system: Use the 15 ft Amphenol-terminated cable as
appropriate. One end of the cable is terminated with a male Amphenol-type
connector that will plug into a female Amphenol-type connector used for
terminating Axxess system stations at the MDF. The other end of the cable is
terminated with 4 prewired RJ-45 plugs for quick connection to the DEM-16s in the
DEI chassis. If necessary, using standard electrical tape, attach two ferrite split
beads, part no. 808.1195, around each 25-pair cable just below the Amphenol-type
connector, as shown in
EMI and RFI.
Figure 5-6.

Example of Ferrite Bead Installation and Connection Types

Adapter cable to
DEI and DEMs
25-pair cables
to the MDF
•
New Installation: Use enough 25-pair cable to run from the MDF to the modules.
Terminate the other end of each 25-pair cable on the left side of the corresponding cable
termination block, and install bridging clips to complete the connections.
page 5-85. The trunk connections are made to the designated Krone blocks.
page 5-31.
Figure 5-6. Ferrite beads may be necessary to help reduce
Amphenol-type
Connectors from existing phone system
®
Inter-Tel 5000 Installation Manual – Issue 2.4, May 2008
Ferrite
beads
page 5-26.