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What must be observed with codec selection with H.323 FastConnect procedure in case of overlap dialing?

April 26, 2017Case codec overlap procedure selection

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What must be observed with codec selection with H.323 FastConnect procedure in case of overlap dialing?

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When using H.323 FastConnect (which is usually the case) together with overlap dialing the voice codec is sometimes not known to the B-side SmartNode in the route lookup. The configuration fragment below exemplifies how to configure a SmartNode such that it also accepts such incoming calls:context cs no number-prefix national no number-prefix international use tone-set-profile default … interface h323 h323_1 routing dest-interface bri1 remoteip 172.19.128.21 codec g711alaw64k interface h323 h323_2 routing dest-interface bri1 remoteip 172.19.128.21 … gateway h323 codec g711alaw64k 10 20 faststart no ras gatekeeper-discovery auto bind interface eth0 router use voip-profile default no shutdown The bold section shows an H.323 interface without codec. This interface is used by the B-side SmartNode in case overlap dialling is used on the A-side and FastConnect is enabled.