asterisk 数字卡(PRI)常见问题以及解决办法 第二部分

Question

===Q47, Cabling for PRI cards===
the pin, 1,2,4,5 are used.
please check from these links:
http://www.pbx.in/digium-te110p-loopback-cable-india-howto
http://www.chebucto.ns.ca/Chebuc ... x6000/gs/cables.htm
http://help.pbxtra.com/Troublesh ... ttern_Loopback_Test
http://www.voip-info.org/wiki/view/ztloop

===Q48, PRI cards working with MFC/R2 中国一号===

please refer these links:
http://www.voip-info.org/wiki/view/Asterisk+MFC+R2
http://zarzamora.com.mx/archivo-historico/48

===Q49, PRI cards working with SS7===

http://www.voip-info.org/wiki/view/Asterisk+SS7
http://www.cesnet.cz/doc/techzpr ... ss7-performance.pdf
http://www.openvox.cn/download/other_docs/ss71.pdf
http://www.pdf-search-engine.com/asterisk-ss7-pdf.html
http://www.openvox.cn/download/other_docs/Test%20chan_ss7.pdf
http://www.astricon.net/2008/glendale/web/presentations/>/Introduction_to_SS7_and_Asterisk_MFredrickson.pdf
中国ss7:http://bbs.openvox.cn/forumdisplay.php?fid=12

===Q50, Resistance of PRI cards===

the resistance of PRI cards from 75 OHM to 120 OHM.

====Q51, BNC connector of PRI cards===

If you requires a BNC connector, OpenVox will provides a BNC connector(Y cable)with PRI cards.
the longer cable is for TX
the shorter cable is for RX