ISDN PRI Capabilities and the Asterisk Implementation ... - Asterisk-ES
ISDN PRI Capabilities and the Asterisk Implementation ... - Asterisk-ES
ISDN PRI Capabilities and the Asterisk Implementation ... - Asterisk-ES
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<strong>ISDN</strong> <strong>PRI</strong> Layer 3 – Temporary Signaling Connections<br />
• St<strong>and</strong>ard D-channel messages, difference is B-channel<br />
• Two Types<br />
Call Associated Temporary Signaling Connection (CA-TSC)<br />
Non Call Associated Temporary Signaling Connection (NCA-TSC)<br />
or Call Independent Signaling Connection (CISC) (QSIG)<br />
• CA-TSC Application -> Distributed Communication System® (DCS)<br />
Pass station data that might o<strong>the</strong>rwise not be passed<br />
• NCA-TSC Application<br />
Carry Message Waiting Indication (MWI) information<br />
Pass query information on call queue parameters<br />
• Can be used through some PSTN network switches<br />
Allows for consolidated voicemail in <strong>the</strong> enterprise<br />
© 2008 AT&T Knowledge Ventures. All rights reserved. AT&T<br />
<strong>and</strong> <strong>the</strong> AT&T logo are trademarks of AT&T Knowledge Ventures. Page 16
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