Direct buried cable more than 1 meter from power requires only bonding.

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When a direct-buried telecommunications cable is kept at least a meter away from power conductors, the main safety measure is equipotential bonding of the cable’s metallic shield or armor to the building’s grounding system. Bonding ensures all metal parts are at the same electrical potential and provides a low-impedance path for fault currents, which protects people and equipment without needing to connect the shield to neutral or isolate it. Grounding to neutral isn’t required for this telecom installation, and isolating the shield would leave it floating and more susceptible to unwanted voltages. So, the required practice is bonding only.