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2.2 Installation of the Hybrid IP-PBX
58 Installation Manual
2.2.9 Attaching a Ferrite Core
A ferrite core must be attached when:
• connecting T1, E1, PRI, BRI, IP-GW16, and IP-EXT16 cards using an RJ45 connector (except in
Canada, where the ferrite core is not necessarily required), or
• connecting extension cards using an Amphenol connector.
The ferrite core is included with the card.
When connecting a T1/E1/PRI/IP-GW16/IP-EXT16 card
Wrap the cable once around the ferrite core, then close the case of the ferrite core. Attach the ferrite core 5
cm away from the connector.
When connecting a BRI card
Attach the ferrite core, then close the case of the ferrite core. Attach the ferrite core as close to the card's
connector as possible.
5 cm
When only 1 or 2 cables are used for connection, wrap the
cable(s) once around the ferrite core.
When 3 or 4 cables are used for connection, simply pass the
cables through the ferrite core.