Use this simple USB Clock to synchronize IP signals when you are not running PSTN hardware. It provides accurate clock timing for Asterisk and CallWeaver. FreeSWITCH support coming soon.
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Telephony, PBX & VoIP > VoIP Hardware > PSTN Cards for Asterisk > Sangoma Accessories
Office & Business > Office Electronics > Telephony, PBX & VoIP > Installation