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Home > Forums > Data Transmission > Communication Protocols > SONET & SDH Forum

How many SL phones can go on a fiber optic

Read More Threads Like This One

sebastienf (TechnicalUser)

12 Nov 07 12:32

Hi,
how many single line phones can go on a fiber optic?

S. Fray

Lundah (TechnicalUser)

12 Nov 07 15:41

Depends on the equipment on the ends of the fiber.

Trotski (TechnicalUser)

13 Nov 07 6:25

the VF band used by an SL phone is digitised at 64kbit and usually 30 x 64K chan to a 2Mbit stream, do the Math from here.

Fiberaccess (Vendor)

25 Feb 08 1:48

Not really.
Most of the products I had seen so far offers just 30 FXS/FXO lines over the fiber

Like this one for example: http://www.ad-net.com.tw/index.php?id=220

and this because they use PDH level to transmit the signals. I ever tried find a mux with more, there was no such.
Can make in different way, just take 4E1 fiber modem, and the connect with PCM E1 to 120 FXS mux, then you will have 120 POTS over fiber...

Trotski (TechnicalUser)

25 Feb 08 3:49

It does depend on the Equipment used, DWDM SDH equip has at least 2.1Gbit per wavelength and some OLS go to 160 Wavelengths (Tbits of Data), most Muxes at a Analog phone level use PCM(30 x 64Kbit)for a 2Mbit output( VC1/2(STM1) on SDH)

Or you can go Ethernet and use Voip tie lines and Gbit Network switchs at either end it reall does depend on what you really need it to do.

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