Voice over IP using E1 Lines

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Aug 7th, 2007
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I am planning to shift normal FXS cards to E1 cards so that i could use E1 lines and their 30 channels using one cable other then using a whole lot of FXS cards each giving just two connection points. I am using 2801 and 3845 routers. Kindly suggest me some Network modules and E1 Cards that support voice and also some example configuration for it. Thanks in advance.


Jay Kishan

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paolo bevilacqua Wed, 08/08/2007 - 02:08
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what router do you have? Generally today the VWIC-xMFT-E1 and the VWIC2-xMFT-T1/E1 are used.

pranabgaya Fri, 08/24/2007 - 03:46
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if u want to use all the channels on E1 , below is a sample config.

controller E1 2/0

framing NO-CRC4

pri-group timeslots 1-31

note: CRC-4 OR NO-CRC4 , same config must be on router and pbx.

interface Serial1/0:15

description -- Q.sig

no ip address

no logging event link-status

isdn switch-type primary-qsig

isdn protocol-emulate network

isdn incoming-voice voice

isdn sending-complete

no cdp enable

voice-port 1/0:15

input gain 1

output attenuation -6

echo-cancel coverage 32

cptone IN

description --- To E1 1/0

busyout monitor Serial0/0.1

hope it helps u, other than this u hav to configure the pots dial-peer and some global config for voice.


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