  We report measurements of the longitudinal and transverse spin relaxation
times of holes in an ensemble of self-assembled InAs/InAlGaAs quantum dots
(QDs), emitting in the telecom spectral range. The spin coherence of a single
carrier is determined using spin mode-locking in the inhomogeneous ensemble of
QDs. Modeling the signal allows us to extract the hole spin coherence time to
be in the range of T$_2 = 0.02-0.4$ $\mu$s. The longitudinal spin relaxation
time T$_1 = 0.5$ $\mu$s is measured using the spin inertia method.
