发明名称 |
Telecommunications multiplexer |
摘要 |
A multiplexer for multiplexing and demultiplexing signals between a low-speed network and a higher speed network includes 7 quad DSX-1 cards and 1 spare card. The spare card is connected to the DSX-1 cards to allow the spare card to automatically be switched in for one of the DSX-1 cards or to allow interface electronics on the spare card to replace selected ones of interface electronics on different DSX-1 cards simultaneously. A pair of controller cards, a primary card and a secondary card, perform M1-3 multiplexing and demultiplexing and the DS-3 framing and transceiving. The controller cards can be selected or deselected in a short time period alarms are not set off and so that the transition is hitless by electronically enabling and disabling the transceiver. The multiplexer is connectable to 2 different T-3 links to provide network redundancy. An array of relays connected either controller card to either of the T-3 links. The controller cards are externally connectable to a computer network for external control thereof. The multiplexer is housed within a reduced volume which occupies a single rack unit on a standard vertical rack used for telecommunications equipment due to a dual backplane architecture in which an external backplane serves as the external connector plane while a separate internal backplane serves as the connection to the DSX-1 cards and controller cards. |
申请公布号 |
AU1378599(A) |
申请公布日期 |
1999.05.24 |
申请号 |
AU19990013785 |
申请日期 |
1998.11.03 |
申请人 |
CARRIER ACCESS CORPORATION |
发明人 |
PHILLIP D. CLARK;KENNETH C. GROBASKI;MATTHEW D. MORRIS;KIRKTON I. SHOOP;MICHAEL A. TROFI;ROGER L. KOENIG;S. CHRISTOPHER ALAIMO;THOMAS E. BULLINGTON |
分类号 |
H04J3/00;H04J3/14;H04J3/16;H04L1/22 |
主分类号 |
H04J3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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