Csu Dsu
2010
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 WIC 1DSU T1 Cisco T1 CSU DSU WAN Card WIC GENUINE CISCO $16.00 Time Remaining: 12d 12h 47m Buy It Now for only: $16.00 |
 Cisco 1841 2 Port 10 100 Wired Router CISCO1841 T1 DSU CSU Tested Working $159.99 (1 Bid) Time Remaining: 2d 13h 38m |
 QTY2 Cisco 1600 Series 1602 Router DSU CSU no module $10.00 Time Remaining: 24d 14h 41m Buy It Now for only: $10.00 |
 Cisco Systems Wic 1DSU T1 Interface Card T1 DSU CSU $39.90 Time Remaining: 28d 13h 21m Buy It Now for only: $39.90 |
 Cisco 1 port T1 fractional T1 Dsu csu Wan Interface Card 1 X T1 ft1 Wan Hwic $608.72 Time Remaining: 6d 19h 2m Buy It Now for only: $608.72 |
 REAL CISCO 1720CISCO172032D 8f+WIC 1DSU T1 DSU CSU $49.00 Time Remaining: 2d 23h 23m Buy It Now for only: $49.00 |
 Cisco 2651 Modular Access Router w T1 DSU CSU $85.00 Time Remaining: 21d 16h 56m Buy It Now for only: $85.00 |
 Cisco T1 DSU CSU WAN Interface Card WIC 1DSU T1 $12.99 Time Remaining: 22d 12h 36m Buy It Now for only: $12.99 |
 Cisco 2500 Series Mod 2524 Wired Router FT T1 DSU CSU $49.99 Time Remaining: 9h 41m Buy It Now for only: $59.99 |
 Cisco Systems 2524 Series Router w FT1 T1 DSU CSU $40.00 Time Remaining: 26d 9h 32m Buy It Now for only: $40.00 |
 ATT Paradyne Comsphere 3610 Modem CSU DSU 3610 A3 001 $19.99 Time Remaining: 4d 12h 13m Buy It Now for only: $19.99 |
 CISCO 2620 ROUTER 2 X WIC T1 DSU CSU DUAL 1DSU T1 CARDS $199.00 Time Remaining: 2d 18h 30m Buy It Now for only: $199.00 |
 NEW ADC Kentrox DataSmart 554 72554 T1 FT1 Single Port DSU CSU Plug In $199.99 Time Remaining: 15d 13h 31m Buy It Now for only: $199.99 |
 Cisco 2801 2 Port 10 100 Wired Router with T1 dsu csu $360.00 Time Remaining: 14h 19m Buy It Now for only: $360.00 |
 Cisco 1700 Series Router w 56k 64k DSU CSU card 1720 $19.69 Time Remaining: 9d 20h 48m Buy It Now for only: $19.69 |
 Lot of 2 ADC Kentrox T Serv II 77965 CSU DSU T1 Unit $179.00 Time Remaining: 2d 42m Buy It Now for only: $179.00 |
 Cisco 2800 Series Router 2801 w T1 DSU CSU w NR $255.00 (4 Bids) Time Remaining: 15h 16m |
 Cisco 2620 Modular Ethernet Access Router w 1 Port T1 DSU CSU WAN Card $34.99 Time Remaining: 10d 17h 17m Buy It Now for only: $34.99 |
 Covad Netopia 4622 XL T1 VPN Modem Router 8 Port CSU DSU AC Adapter FREE S H $49.99 Time Remaining: 11d 23h 21m Buy It Now for only: $49.99 |
 Adtran T3SU 300 T3 DSU CSU DC 1200217L4 4 Port $499.00 Time Remaining: 3d 5h 17m Buy It Now for only: $499.00 |
 Cisco 1760 1 Port 10 100 Wired Router CISCO1760 with 56K CSU DSU card $70.00 Time Remaining: 27d 9h 31m Buy It Now for only: $70.00 |
 Cisco Systems 2524 Modular Router FT1 T1 DSU CSU Module 2500 $20.00 Time Remaining: 23d 15h 4m Buy It Now for only: $20.00 |
 Cisco WIC 1DSU T1 V2 1 Port T1 CSU DSU Card $24.95 Time Remaining: 13d 12h 35m Buy It Now for only: $24.95 |
 Netopia D7100C Router SDSl CSU DSU 8 Port $19.99 Time Remaining: 3d 20h 3m Buy It Now for only: $19.99 |
 Cisco Systems 2500 Series 2524 Wired Router CISCO2524 FT T1 DSU CSU FREE SHIP $19.95 Time Remaining: 2d 19h 28m Buy It Now for only: $24.95 |
 Motorola Codex 3512 DSU CSU Modem PC49151 $20.00 Time Remaining: 24d 17h 52m Buy It Now for only: $20.00 |
 REAL CISCO 1721 64DRAM +2WIC 1DSU T1DSU CSU CISCO1721 $139.00 Time Remaining: 22d 31m Buy It Now for only: $139.00 |
 Cisco 1720 100 Mbps 1 Port 10 100 Wired CSU DSU Router $12.99 Time Remaining: 18d 20h 42m Buy It Now for only: $12.99 |
 Genuine Authentic WIC 1DSU T1 V2 Cisco Updated T1 Fractional T1 CSU DSU $24.00 Time Remaining: 8d 13h 41m Buy It Now for only: $24.00 |
 Adtran T3SU 300 T3 DSU CSU 300 DS3 1200217L2 4 port $199.00 Time Remaining: 21d 16h 39m Buy It Now for only: $199.00 |
 AdTran TSU ACE 1stGen 1200295L1 T1 FT1 DSU CSU w Cable 52 $9.99 Time Remaining: 16d 10h 33m Buy It Now for only: $9.99 |
 Cisco 1841 Integrated Services Router with Cisco T1 DSU CSU WIC $600.00 Time Remaining: 2d 13h 5m Buy It Now for only: $975.00 |
 CISCO 1721 128D 32f+REAL WIC 1DSU T1 DSU CSU CISCO1721 $149.00 Time Remaining: 14d 2m Buy It Now for only: $149.00 |
 Cisco 2801 Router with T1 DSU CSU $995.00 Time Remaining: 27d 18h 4m Buy It Now for only: $995.00 |
 Adtran 1202295L1 T1 Fractional T1 CSU DSU 1 x 34 pin Serial V35 Mechanical $212.67 Time Remaining: 29d 23h 7m Buy It Now for only: $212.67 |
 Adtran 1202295L1 T1 Fractional T1 CSU DSU 1 x 34 pin Serial V35 Mechanical $188.47 Time Remaining: 29d 23h 7m Buy It Now for only: $188.47 |
 Cisco T1 DSU CSU WAN Interface Card WIC 1DSU T1 V2 $49.32 Time Remaining: 4d 1h 33m Buy It Now for only: $49.32 |
 Cisco 1 Port T1 Fractional T1 DSU CSU WAN Interface Card DSU CSU HWIC 1DSU T1 $686.99 Time Remaining: 28d 13m Buy It Now for only: $686.99 |
 Osicom ROUTERmate T1 CSU DSU 4800 Series 550 0366 01 905 5261 001 Wired Router $19.99 Time Remaining: 10d 13h 42m Buy It Now for only: $19.99 |
 Cisco 1841 Integrated Services Router with Cisco T1 DSU CSU WIC $600.00 Time Remaining: 2d 13h 1m Buy It Now for only: $975.00 |
 Cisco 1720 Series Router Dual T1 DSU CSU WIC 1DSU T1 $45.00 Time Remaining: 12d 17h 29m Buy It Now for only: $45.00 |
 Cisco 1600 Series 1601R Router with T1 DSU CSU Card Software Feature Pack $150.00 Time Remaining: 27d 15h 47m Buy It Now for only: $150.00 |
 Cisco Model 1721 Router w T1DSU CSU WIC 1DSU T1 10 100 Ethernet $49.99 Time Remaining: 4d 18h 5m Buy It Now for only: $49.99 |
 Cisco 2500 Series Router Model 2524 + 2x FT1 T1 DSU CSU Modules $49.99 Time Remaining: 5d 19h 6m Buy It Now for only: $49.99 |
 Cisco Catalyst Router 2500 series 2524 FT1 T1 DSU CSU $19.99 Time Remaining: 24d 10h 51m Buy It Now for only: $19.99 |
 Cisco 1760 Router w 1 WIC 1DSU T1 V2 T1 DSU CSU MODULE $79.99 Time Remaining: 9d 21h 30m Buy It Now for only: $79.99 |
 ADC Kentrox D Serv T1 01 78222003 DSU CSU Modem with CABLES Included $19.99 Time Remaining: 13d 20h 26m Buy It Now for only: $19.99 |
 Cisco 1841 Router T1 DSU CSU module WIC 1DSU T1 V2 32MB Flash 1840 1800 series $163.50 (6 Bids) Time Remaining: 7d 13h 57m |
 Adtran TSU LT 1203060L2 DSU CSU Modem CCNA WAN LAN NETWORK LOT Business $10.00 Time Remaining: 29d 10h 8m Buy It Now for only: $10.00 |
 ADC Kentrox Satellite 651 72651 DSU CSU Modem $25.00 Time Remaining: 13d 19h 8m Buy It Now for only: $25.00 |
 Adtran TSU ACE 2nd Gen 1202295L1GOV DSU CSU Modem CCNA CISCO WAN LAN NETWOR $12.00 Time Remaining: 29d 10h 16m Buy It Now for only: $12.00 |
 Cisco WIC 1DSU T1 DSU CSU Router Module 28 2376 03 $19.99 Time Remaining: 28d 22h 42m Buy It Now for only: $19.99 |
 Cisco 2600 2650XM Router w 4 T1 DSU CSU WIC 1DSU T1 $199.00 Time Remaining: 18d 13h 45m Buy It Now for only: $199.00 |
 Cisco WIC 1DSU T1 WAN Card T1 DSU CSU $49.95 Time Remaining: 29d 13h 29m Buy It Now for only: $49.95 |
 Cisco 1600 Series Router 1601 R WIC 1DSU T1 DSU CSU 4MB Flash $30.00 Time Remaining: 4d 17h 55m Buy It Now for only: $40.00 |
 CISCO 1841 ROUTER v04 W 2 T1 DSU CSU MODULES 64MB FLASH CARD $379.99 Time Remaining: 25d 16h 26m Buy It Now for only: $379.99 |
 Cisco 2524 Wired Router CISCO2524 FT1 T1 DSU CSU ISDN BRI NT1 $39.99 Time Remaining: 14d 10h 17m Buy It Now for only: $39.99 |
 AdTran TSU LT 1202060l1 Single Port T1 DSU CSU $109.65 Time Remaining: 9d 14h 34m Buy It Now for only: $109.65 |
 Cisco 1602 Ethernet Serial DSU CSU Router Cracked Case $6.00 Time Remaining: 1d 13h 27m Buy It Now for only: $6.00 |
 Adtran IQ 310 1203800L1 DSU CSU Modem $19.99 Time Remaining: 5d 10h 26m Buy It Now for only: $19.99 |
 Adtran T3SU 300 T3 DSU CSU DC 1200217L4 1x Quad dsx 1 1 Year Warranty $599.00 Time Remaining: 2d 19h 29m Buy It Now for only: $599.00 |
 ATT Paradyne Comsphere 3610 Modem CSU DSU 3610 A3 004 $39.99 Time Remaining: 5d 12h 43m Buy It Now for only: $39.99 |
 Cisco Series 1720 Wired Router with 1 DSU CSU T1 Module $29.99 Time Remaining: 5d 21h 3m Buy It Now for only: $69.99 |
 Cisco 1720 100 Mbps 1 Port 10 100 Wired Router with T1 DSU CSU Card $29.95 Time Remaining: 28d 14h 52m Buy It Now for only: $29.95 |
 Adtran 1200062L1 56 64 DSU DDS1KK04AA DDS1KK0 CSU $25.00 Time Remaining: 2d 14h 35m Buy It Now for only: $25.00 |
 ADC Kentrox Satellite 931 77931 DSU CSU Modem $75.00 Time Remaining: 1d 10h 29m Buy It Now for only: $75.00 |
 CISCO SYSTEMS 1720 ROUTER WITH WIC 1DSU 56 64K DSU CSU MODULE $9.91 Time Remaining: 15d 15h 8m Buy It Now for only: $9.91 |
 Motorola UDS FT 100S DSU CSU Modem $7.99 Time Remaining: 23d 8h 43m Buy It Now for only: $7.99 |
 Adtran TSU 120e Embedded Snmp Dsx 1 V35 CSU DSU T1 TF1 $59.49 Time Remaining: 6d 21h 37m Buy It Now for only: $59.49 |
 REAL CISCO 1720CISCO172048D 16f+WIC 1DSU T1 DSU CSU $89.00 Time Remaining: 9d 9h 3m Buy It Now for only: $89.00 |
 Used ADC Kentrox D Serv 78222003 DSU CSU Modem $29.99 Time Remaining: 1d 10h 59m |
 ADTRAN T3SU 300 T3 DSU CSU Quad DSX 1 1200284L1 10 100Base T TX 1200655L1 $195.95 Time Remaining: 5d 13h 46m Buy It Now for only: $195.95 |
 Cisco 2524 Wired Router CISCO2524 FT1 T1 DSU CSU ISDN BRI NT1 $49.99 Time Remaining: 14d 9h 11m Buy It Now for only: $49.99 |
 Cisco 1602 Ethernet Serial Modular Router DSU CSU $20.00 Time Remaining: 23d 7h 17m Buy It Now for only: $20.00 |
 Cisco 2524 Wired Router CISCO2524 4 Wire56K 64K DSU CSU ISDN BRI NT1 $49.99 Time Remaining: 14d 9h 14m Buy It Now for only: $49.99 |
 Cisco 3640 Router 6 T1 DSU CSU 3 ETHERNET 3 AUI $399.99 Time Remaining: 10d 17h 56m Buy It Now for only: $399.99 |
 Cisco T1 DSU CSU WAN Interface Card DSU CSU plug in module WIC 1544 Mbp $198.10 Time Remaining: 11d 18h 16m Buy It Now for only: $198.10 |
 IBM 56K DSU CSU External Modem 5821 10 $25.00 Time Remaining: 1d 21h 11m |
 Adtran TSU 1200060L1 1200060L1 Single T1 DSU CSU w DTE $19.99 Time Remaining: 29d 14h 7m Buy It Now for only: $19.99 |
 Cisco WIC 1DSU T1 1 Port T1 Fractional T1 DSU CSU WAN Interface Card $9.99 Time Remaining: 22d 9h 21m Buy It Now for only: $9.99 |
 Adtran TSU 120e 1202129L1 Modular T1 FT1 DSU CSU Multiplexer Modem $39.95 Time Remaining: 18d 21h 42m Buy It Now for only: $39.95 |
 Motorola UDS 2440 Modem CSU DSU $60.00 Time Remaining: 8d 17h 1m Buy It Now for only: $60.00 |
 ADC Kentrox D Serv 78222003 DSU CSU Modem $9.99 Time Remaining: 25d 15h 17m Buy It Now for only: $9.99 |
 Cisco 1601 1601R Wired Router T1 DSU CSU CCNA $24.00 Time Remaining: 11d 17h 56m Buy It Now for only: $24.00 |
 Motorola UDS SW56 II External Modem DSU CSU $75.00 Time Remaining: 17d 16h 29m Buy It Now for only: $75.00 |
 Used Adtran DSU III AR 1202011L1 64 Kbps DSU CSU with V35 Cable $59.99 Time Remaining: 1d 10h 59m |
 Excalibur ISX 5311 Single port T 1 DSU CSU $41.65 Time Remaining: 9d 14h 34m Buy It Now for only: $41.65 |
 Adtran 1202129L2 TSU 120 Modular T1 FT1 DSU CSU Multiplexer T1 FT1 Modem $39.95 Time Remaining: 18d 21h 42m Buy It Now for only: $39.95 |
 Motorola 3500 DSU CSU Codex 56k Modem PC48900 $25.00 Time Remaining: 3d 18h 3m Buy It Now for only: $25.00 |
 Paradyne S A 2 PORT DSU CSU Modem Model 3160 A3 210 $199.00 Time Remaining: 15d 11h 24m Buy It Now for only: $199.00 |
 Racal ISX 5300 Excalibur Multiplexor CSU DSU $14.99 Time Remaining: 19d 11h 44m Buy It Now for only: $14.99 |
 ADTRAN NetVanta 3200 Router DSU CSU Frame Relay desktop 4200862L1 $812.99 Time Remaining: 9d 15h 49m Buy It Now for only: $812.99 |
 CISCO 2425 ROUTER DSU CSU+ISDN BRI NT1+SYNCHRO SER WAN $79.99 Time Remaining: 3d 17h 45m Buy It Now for only: $79.99 |
 2 Adtran DSUIIIARdc 1200270L1 DSU CSU Modems Untested $100.00 Time Remaining: 6d 15h 10m |
 IBM 5822 10 External DSU CSU Modem + Power Supply Cable $20.07 Time Remaining: 28d 8h 37m Buy It Now for only: $20.07 |
 Cisco WAN Interface Card DSU CSU plug in module 64 Kbps f WIC 1DSU 56K4 $499.99 Time Remaining: 9d 14h 41m Buy It Now for only: $499.99 |
 Adtran TSU ACE 2nd Gen 1202295L1GOV DSU CSU Modem $399.95 Time Remaining: 13h 27m Buy It Now for only: $399.95 |
 Adtran TSU ACE 2nd Gen 1202295L1GOV DSU CSU Modem $99.95 Time Remaining: 13h 39m Buy It Now for only: $99.95 |
 REAL CISCO 1720 CISCO1720 48D 16f+2WIC 1DSU T1 DSU CSU $99.00 Time Remaining: 24d 16h 42m Buy It Now for only: $99.00 |
 Cisco WIC 1DSU T1 V2 T1 Fractional T1 DSU CSU $75.00 Time Remaining: 10d 11h 4m Buy It Now for only: $75.00 |
Csu Dsu
How A T1 Line Works
When trying to convince your boss that your company needs T1 bandwidth to help solve a network issue and meet business function requirements …. it comes in handy to know just how a T1 line works. Without that understanding you're more likely to lose the argument and remain stuck with whatever dinosaur set-up you're trying to move away from. As your company's go-to IT person … you can't afford to lose those battles.
You already know that there are many flavors of T1. But you need not go into that with your boss. If necessary you can adequately describe in simple terms the difference between fractional, full, and bonded … as well as the general aspects of point-to-point and MPLS architecture. For the purposes of making your main point … just stick with describing the basic single point-to-point T1 line..
For a generic point-to-point T1 circuit, part by part, generically speaking it works like this from the premises back.
Your router CSU/DSU DS1 signal connects to a SmartJack aka a Highcap Remote Unit (HRU) mounted in the Network Customer Terminating Equipment (NCTE) also known as the mounting which converts the DS1 signal to a T1 for transport.
From there it is connected by either a single pair or two depending on the technology utilized to the central office repeater shelf where a Highcap Line Unit (HLU) is installed which converts the T1 signal back to a DS1 and also provides 186 or 130 volts over the copper pair(s) to power the HRU.
From the CO repeater shelf the DS1 signal along with 27 others are passed to a Digital Access Crossconnect System (DACS) or muxed up to a DS3 and then to the DACS which provides mapping of the DS1 signals and remote testing capabilities.
Out of the DACS the signal is most commonly a DS3 or higher and passed to another MUX along with other DS3's for conversion to an OCx for interoffice transport.
At the other end the process is reversed.
As far as a T1 switching device at the provider end … depending on the type of circuit, there are fast packet switches, frame relay switches and routers.
Now your boss may turn glassy eyed halfway through your technical diatribe above …. but that's alright. You have shown a thorough knowledge of the workings behind what you want … a T1 line based network. That should be enough to impress upon him or her that you know what you're talking about from the technical side. From there … all you need to do is address the cost benefit. For that simply show the impact of your current poor performing network on the core functions of the business …. compared to the improvement(s) gained with the network architecture you're recommending.
About the Author
Michael is the owner of FreedomFire Communications .... and also authors Broadband Nation where you're always welcome to drop in and catch up on the latest BroadBand news, tips, insights, and ramblings for the masses.
For quality Dedicated Bandwidth service, protect yourself and your investment by comparing amongst 30 first and top tier carriers where you have a Low Price Guarantee. For more information about Dedicated Bandwidth and finding your best deals and options, please visit DS3 Bandwidth Solution.
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