Home Office Business

White RJ11 to RJ11 Home Office Telephone Line Cord $3.52 Time Remaining: 1h 28m

Northwestern Large Button Corded Phone w 13 Number Memory Telephone Home Office $35.99 Time Remaining: 6d 3h 59m Buy It Now for only: $35.99

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Classical Piano Shape Cable Retro Corded Phone Home Office Desk Telephone Black $28.95 Time Remaining: 7h 51m

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LANDMARK T305 HOME OFFICE BUSINESS TELEPHONE CORDED PHONE NEW IN BOX $11.95 Time Remaining: 5d 10h 20m Buy It Now for only: $11.95

White Home Office RJ11 to RJ11 Telephone Cable Line $5.04 Time Remaining: 3d 17h 37m Buy It Now for only: $5.04

White RJ11 to RJ11 Home Office Telephone Line Cord $3.52 Time Remaining: 6d 19h 44m Buy It Now for only: $3.52

Big Apple Wired Home office Table Telephone Red $15.00 Time Remaining: 19h 24m

Home Office Desk Table Purple Mouth Style Telephone $22.77 Time Remaining: 13d 12h 43m Buy It Now for only: $22.77

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GE 29640GE2 CORDED 2 LINE TELEPHONE FOR OFFICE OR HOME $71.10 Time Remaining: 14d 18h 36m Buy It Now for only: $71.10

NEW Cartel CT 5100 Bluetooth Desktop Speakerphone w Handset For Home Office $225.00 Time Remaining: 2d 17h 19m Buy It Now for only: $249.00

PANASONIC KX T3120 2 LINE CORDED OFFICE OR HOME PHONE $33.30 Time Remaining: 29d 15h 46m Buy It Now for only: $33.30

LUCENT 8110M SINGLE LINE CORDED TELEPHONE SYSTEM FOR HOME OR OFFICE $35.10 Time Remaining: 10d 9h 56m Buy It Now for only: $35.10

VODAVI STARPLUS CORDED TELEPHONE 2802 08 HOME OFFICE $24.30 Time Remaining: 22d 9h 19m Buy It Now for only: $24.30

Home Office Desk Table Purple Mouth Style Telephone $23.46 Time Remaining: 12d 13h 28m Buy It Now for only: $23.46

Big Red Apple Wired Home office Table Telephone NEW $19.23 Time Remaining: 27d 19h 16m Buy It Now for only: $19.23

BELL SOUTH PRODUCTS HOME OFFICE TELEPHONE NIB $19.95 Time Remaining: 2d 20h 22m

Home Office Desk Table Purple Mouth Style Telephone $23.17 Time Remaining: 5d 1h 33m Buy It Now for only: $23.17

LANDMARK T305 HOME OFFICE BUSINESS TELEPHONE SYSTEM CORDED PHONE NEW IN BOX $11.95 Time Remaining: 5d 11h 43m Buy It Now for only: $11.95

White Home Office RJ11 to RJ11 Telephone Cable Line $5.04 Time Remaining: 3d 20h 7m Buy It Now for only: $5.04

Big Red Apple Wired Home office Table Telephone NEW $15.00 Time Remaining: 27d 19h 19m Buy It Now for only: $15.00

Big Apple Wired Home office Table Telephone Red $17.93 Time Remaining: 2d 21h 23m

Home Office Telephone Line Cord Wall Outlet to Phone Corded Cordless Base 7 Feet $2.99 Time Remaining: 3d 22h 47m Buy It Now for only: $2.99

Anti Twist Home Office Shop Phone Cable Cord Organizer $1.02 Time Remaining: 3d 2h 20m Buy It Now for only: $1.02

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White RJ11 to RJ11 Home Office Telephone Line Cord $7.01 Time Remaining: 16d 13h 17m Buy It Now for only: $7.01

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Big Apple Wired Home office Table Telephone Red $15.00 Time Remaining: 26d 19h 19m Buy It Now for only: $15.00

White Home Office RJ11 to RJ11 Telephone Cable Line $5.04 Time Remaining: 6d 23h 2m Buy It Now for only: $5.04

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BEAUTIFUL WINE BOTTLE TELEPHONE PHONE LAND LINE DECOR HOME OFFICE $44.99 Time Remaining: 5d 18h 21m

Straight Home Office White RJ11 Telephone Cord Line $3.23 Time Remaining: 19d 10h 18m Buy It Now for only: $3.23

Home Office Desk Table Purple Mouth Style Telephone $22.76 Time Remaining: 5d 21h 6m Buy It Now for only: $22.76

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Home Office Desk Table Purple Mouth Style Telephone $23.51 Time Remaining: 5d 21h 30m Buy It Now for only: $23.51

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White RJ11 to RJ11 Home Office Telephone Line Cord $3.52 Time Remaining: 4d 21h 6m Buy It Now for only: $3.52

Bellsouth 10 Memory Feature Phone MN 229 Home or Office Telephone Wall Desk $10.00 Time Remaining: 20d 14h 26m Buy It Now for only: $10.00

Home Office Desk Table Purple Mouth Style Telephone $23.15 Time Remaining: 13d 4h 33m Buy It Now for only: $23.15

Classical Piano Shape Cable Retro Corded Phone Home Office Desk Telephone Black $28.95 Time Remaining: 15d 19h 40m Buy It Now for only: $28.95

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Home Shop Office Phone Cable Cord Anti Twist Organizer $1.02 Time Remaining: 3d 2h 47m Buy It Now for only: $1.02

Att 815 officehome corded telephone memory walltable $24.99 Time Remaining: 9d 18h 56m Buy It Now for only: $24.99

BellSouth Supremacy 4300 4 line Home Office phone good $39.95 Time Remaining: 8d 7h 2m Buy It Now for only: $39.95

ATT 98381 Telephone Black Analogue for home office $37.22 Time Remaining: 4d 23h 11m Buy It Now for only: $37.22

White Home Office RJ11 to RJ11 Telephone Cable Line $5.04 Time Remaining: 22h 25m

Plantronics CS55 Wireless home office phone $150.00 Time Remaining: 1d 15h 40m Buy It Now for only: $150.00

SWAROVSKI CRYSTAL HOME OFFICE PHONE KIM AND KHLOE KARDASHIAN EPISODE BEAUTIFUL $285.00 Time Remaining: 29d 13h 51m Buy It Now for only: $285.00

iConcepts 8 foot compact retractable Home Office Organizer tele phone cord NOS $3.87 Time Remaining: 24d 10h 52m Buy It Now for only: $3.87

MITEL SUPER SET420 TSG Light Gray Telephone 9115 0XX 900 NA FOR HOME OR OFFICE $12.99 Time Remaining: 15d 25m Buy It Now for only: $12.99

{$KEYWORD} Q & A
What's the difference between telephone line and subscriber line?

A book says a telephone line normally has a bandwidth of 3kHz and the highest bit rate for a telephone line is 34.860kbps(using shannon formula).
It also says the bandwidth of a subscriber line is 4kHz and the upper bit rate can be up to 56kbps(using a sophisticated modem to change the digital signal to analog).
I don't know why the upper bit rate is 56kbps.How to calculate it?

First you are mixing apples and oranges.

A true Modem uses a plain old telephone service line. PoTS
They download at speeds limited by the FCC to 53Kb/s. They upload at 33Kb/s <-- here's your Shannon Formula limit in practice.

A subscriber line is what DSL uses. Digital Subscriber Line.

The things people use for Cable, DSL, FiOS, or Satellite Internet access are not Modems. They do NOT MOdulate or DEModulate. That is the definition of MODEM, it must MOdulate and DEModulate, which is converting a digital signal to an analog one, and vice-versa. They are physical network bridges. They bridge a digital signal from Ethernet or USB; to Cable, DSL, or Satellite maintaining the digital format of the original signal.

Home Office Business