<P>hi,</P>
<P>I have the following scenario,</P>
<P>an Asterisk server<BR>anolog pbx</P>
<P>I hav a channel bank, it accepts 30 analog lines coming from the analog pbx,<BR>the other end of the channel bank is the asterisk server with E100P card.<BR>I am confused as to which type of lines to get from the analog pbx.</P>
<P>I think its suffient to have normal analog extensions, which they are already<BR>having in there pbx, plugged into analog phones.</P>
<P>When i contacted the pbx guys to do the upgrade for me(upgrade by 30 chs), they ask me whether, i need E&M lines or not.<BR>I am very sorry for asking this, if these are general knowledge stuff.<BR>I know that normal analog lines work with the loop current changes, and i found out that, In E&M (Ear and Mouth) line signalling the speech circuit (or channel) has an associated E-wire and M-wire for signalling. </P>
<P>Can anybody pls tell me as to which type of lines should i get from the analog pbx,<BR>whether normal analog lines or E&M lines?</P>
<P>Thanx in advance,</P>
<P>Surajee</P><br>
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