Learning IOS and JUNOS

There are two types of circuits an enterprise can use to route 911 calls to the proper PSAPs (public safety answering points) and deliver the 10-digit caller ID: ISDN PRIs or Centralized Automatic Message Accounting (CAMA) trunks. "ISDN is the wea port of choice from our perspective," says Guy Clinch, Avaya's government solutions director and a member of the National Emergency Number Association's PBX/multi-line telephone system technical subcommittee, because you can fit more phone lines in a PRI and assign each of those numbers to represent a separate ERL. In short, you can map your location and send more granular location information to the PSAP. But as many as 85% of enterprises choose instead to retrofit their IP PBXs using legacy analog CAMA trunks for entry into the public safety system, Clinch says. It's cheaper, because the CAMA trunk is equivalent to on phone number, so they get charged only once. The downside: CAMA trunks cannot deliver a custom caller ...

Cisco Monitor Director , a centralized proactive solutions-management tool for Cisco channel partners to offer multicustomer outsourced 24-hour network management services. It communicates with the Cisco Monitor Manager residing on a customer's premises to provide comprehensive, real-time monitoring, alerting and reporting to help troubleshoot and fix issues remotely. Combining these management tools helps enable Cisco channel partners become trusted advisers to their customers.

The Smart Phone Control Protocol, or SPCS, is an addition to the Simple Call Control Protocol (SCCP) that is only supported on the CP-500 phones and the SPA525 phone. 79XX phones register with their SCCP call control using a proprietary handshake that consists of a series of messages. During the registration phase a number of things happen: 1. Phone (Station) sends a Registration Request 2. Request is acknowledged by the Call Control (CME/UC500) 3. Capabilities are advertised 4. Button template, Softkeys, Line Status, Display message, Speed dials Time and date are requested by the phone and sent by CME/UC500 When the phone is a 500 series phone, two additional messages precede all this handshake, namely an SPCP Token Request and an SPCP Token Acknowledgement (if successful) or Token rejection (if unsuccessful). A Token ACK can only be sent by UC500 , while an ISR will always send a Token Reject . This prevents the phone from registering to any call control different than UC500.

2008/08/27-杜念魯 所謂的PTZ攝影機，其實與一般的監控用攝影機並沒有太多的差異，但是所謂的PTZ則是表示攝影機的鏡頭可以進行左右轉動(Pan)、上下傾斜(Tilt)與放大(Zoom)等不同的功能。 而透過PTZ攝影機，可以隨時改變攝影的角度與所涵蓋的範圍與清晰度，相較於傳統僅能單一運動的攝影機，可以獲得更好的監控效果。而且透過多台PTZ攝影機之間在空間位置上的相互關係，更有利於智慧型監控目的的達成。所以PTZ攝影機在目前監控市場中，已經成為多數使用者所偏好的產品。

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工商時報 2009-09-23 【朱漢崙／台北報導】 　為迎戰台灣大跨足有線電視，遠東集團旗下遠傳電信已密商韓系知名私募基金安博凱（MBK），要買下中嘉！外資圈權威消息人士透露，遠傳數月前已接觸安博凱，希望買下中嘉，上週台灣大哥大搶先一步買下凱擘的東森系統台，加深遠傳鞏固市場優勢的警覺，與安博凱的協商已進入緊鑼密鼓階段，近期可望傳出佳音。 　而遠東集團、富邦集團的電信事業對決，也將因彼此都拿下有線電視系統台，而進入新的里程碑。 　先前台灣大買下有線電視目前市佔率第一名的東森系統台，出價568億元，據了解，遠傳此次買下安博凱所有的中嘉，目前雙方談判的成交價，以中嘉收視戶120萬戶，而每戶約5萬元的市場行情估算，上看600億元。 　消息人士說，遠傳早已對此布局，而台灣大接手凱擘為一道有力「觸媒」，促使遠東集團對此案，從鴨子划水開始加速進行，包括遠傳董事長徐旭東、安博凱的台灣區代表人龔國權，已有所接觸。 　中嘉曾是有線電視系統台的龍頭，儘管目前已被東森追上，名列第二，但市佔率仍以20％緊追東森系統台的22％，若電信「二哥」遠傳成功拿下中嘉，將可避免「一哥」台灣大拿下東森系統台之後，挾電信業結盟有線電視的優勢，擴大彼此差距。 　在財務規劃上，據消息人士透露，成交價上看600億元的這起交易，是採全數現金交易，或換股、現金各半，尚未決定；若全採現金交易，則遠傳擬向外募集的資金，約在350億元左右，若採取現金、換股各半的模式進行交易，則對外募資金額，將可大幅降低，至於以承接負債來抵減部分交易金額的方式，也在考慮之列。 　安博凱2年半前以14.35億美元，約台幣470億元的價格，取得中嘉所屬11個系統台60％股權。若雙方交易以上看600億元的價格底定，那不到3年時間，安博凱就淨賺130億元。 　中嘉目前有三股勢力，最大的就是這次談判主體安博凱，全球媒體大王梅鐸與中信集團辜濂松家族，各持股20％，股東結構比起東森系統台較複雜，不過由於安博凱持有過半股權，一旦成交，遠東集團將入主中嘉。

Wide area file services (WAFS) products allow remote office users to access and share files globally at LAN speeds over the WAN . Distributed enterprises that deploy WAFS solutions are able to consolidate storage to corporate datacenters, eliminating the need to back up and manage data that previously resided in their remote offices. WAFS uses techniques such as CIFS and MAPI protocol optimization, data compression , and sometimes storing recurrent data patterns in a local cache . WAFS is a subset of WAN optimization , which also caches SSL Intranet and ASP applications and elearning multimedia traffic as well, to accelerate a greater percentage of WAN traffic.