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For 34 Mbps (an E3?), CBWFQ with class-default using FQ might be "good enough".
policy-map Sample
class class-default
fair-queue
int (34mbps)
service-policy output Sample
If that's not sufficient, you can define a class for VoIP and use LLQ, e.g.
class-map match-all VoIP
match (you'll need to determine how to match your VoIP - might be by L3 ToS and/or NBAR and/or ACL)
policy-map Sample
class VoIP
priority percent 30
class class-default
fair-queue
