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Steve Totaro wrote:
<blockquote cite="mid47151704.9000905@totarotechnologies.com"
type="cite">
<pre wrap="">Richard Lyman wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Steve Totaro wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I need to create a couple of tie lines between a legacy system and an
Asterisk system. I was told that the tie lines are E4 Superframe E&M.
I have done E&M wink but have no idea about E4 Superframe E&M and Google
is not helping me here.
Does anyone know about this type of signaling and if Asterisk can handle it?
Thanks,
Steve
</pre>
</blockquote>
<pre wrap="">use this
zaptel.conf
span=1,1,0,d4,ami
e&m=1-24 ; 1-32 for E4
zapata.conf
signalling=em
channel => 1-24 ; 1-32 for E4
</pre>
</blockquote>
<pre wrap=""><!---->
Thanks to everyone who has responded so quickly to my question.
To my way of thinking, it would be better to have the legacy tie-line
reconfigured to use esf if possible.
Is D4 (superframe) well supported in Asterisk, are there less features?
If it is virtually the same, then I guess I will just setup Asterisk
to use it rather than messing with the legacy system.
Thanks,
Steve
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</pre>
</blockquote>
D4 superframe - more bits are used for chan signalling, results in 56k
voice channels.<br>
Extended superframe - fewer bits used for chan signalling, results in
64k voice channels.<br>
<br>
Otherwise basically the same, both are 1.544 mbps. If the T1 goes
down, D4 takes longer to frame up than ESF. But for pbx to pbx, aren't
they going to be located in the same room?<br>
<br>
Lyle<br>
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