illusion faces or vase 230It works and is deployed in dozens of places, including British Telecom and AT&T. T reports typical speeds of 750 megabits, up and down combined. The highest speeds go less than 150 meters, which is fine for fiber to the basement. In 2018, 212 MHz chips will double that speed. Plans include 10M homes passed by BT and a million at nbn Australia.

AT&T and Deutsche Telekom are first doing from the basement for highest speeds. "Wireless to the rooftop" (WTTR) is attractive to others. BT has pioneered long reach to homes, getting speeds of 160 to 330 megabits 300 meters. nbn is running fiber to "distribution points" close to homes, expecting high performance. The small DSLAMs can go on poles or in pits.

Broadcom and Sckipio compete for most chip orders. Sckipio has advanced features while Broadcom offers VDSL compatibility. Metanoia is supplying modem chips to Huawei and Telecom Austria.

Adtran, Calix, Huawei, Netcomm Wireless, Nokia, and ZTE are providing most of the DSLAMs. Adtran supplies AT&T and nbn, among others. Calix has over 60 deployments, many small. They are in trials with Deutsche Telekom as well. Huawei is a contender everywhere except Australia and the U.S., which have security concerns. Australian company Netcomm has large contracts from nbn, Nokia shares the BT contract with Huawei. ZTE has NetCologne and MNet in Munich as customers. All seem to offer reliable equipment. No vendor has convinced me they are far ahead of the others. 

Technicolor, Xyzel, and Taiwan ODMs join the DSLAM vendors in offering modems. Interoperability between modems and DSLAMs from different vendors has been demonstrated at Broadband Forum events, although some problems remain. 

16-24 ports was the maximum with early equipment. Huawei and I believe others are now shipping external vector units that raise that to 48 and 96 ports. Sckipio and Calix in late 2017 showed a 48 port DSLAM which can be linked with another for 96 ports. 

Bonding works and has been demonstrated, but rarely commercially deployed.


Latest issue

Jan 18

300,000 Indian Villages Fibered; 325,000 More To Come
Verizon, NTT, AT&T: ?$200-$400 5G Costs Much Lower Than Expected
Important: 5G Handles 10x More Data Than 4G
India Passes U.S. in Smartphones
AT&T Probably Will Not Have a 5G Mobile Phone in 2018
Pai, Speaking of Immigration, Put His Career on the Line
35b: Ready or Not? Germans Say Not, Some Say Yes
Qualcomm's Not To Be Believed Comeback in

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Manoj Sinha announced that 300,000 Indian villages have been connected by fiber and BharatNet is on target for 325,000 more early in 2019. This is by far the largest rural broadband project in history. Bids are out for 500,000 Wi-Fi hotspots and 130.000 post offices will connect. The telcos are offered low prices to bring in LTE and fiber home. Programs are underway for > 100,000 local business to offer connectivity.  

Ajit Pai risked his career by challenging Trump's immigration policy. "My love and reverence for this country comes from living in the house of Raj and Radha Pai. My parents know a little something about the American Dream. They came to this country 46 years ago with literally no assets other than $10, a transistor radio, and a desire to achieve that dream." I never imagined America would plan to deport four million people. 

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