Yes. At the start of שַׁחֲרִית and מַעֲרִיב, after the "spiritual warm-up" of פְּסוּקֵי דְזִמְרָא in the former case and וְהוּא רַחוּם in the latter, there is a call to prayer: The chazzan says בָּרְכוּ אֶת־ה׳ הַמְּבוֹרָךְ, the congregation replies בָּרוּךְ ה׳ הַמְּבוֹרָךְ לְעוֹלָם וָעֶד, and the chazzan repeats בָּרוּךְ ה׳ הַמְּבוֹרָךְ לְעוֹלָם וָעֶד.
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Date: 2010-07-22 01:21 pm (UTC)בָּרוּךְ ה׳ הַמְּבוֹרָךְ לְעוֹלָם וָעֶד, and the chazzan repeats בָּרוּךְ ה׳ הַמְּבוֹרָךְ לְעוֹלָם וָעֶד.