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Try "type fxs-loop-start".<br>
<br>
Some references:<br>
<br>
Understanding How Digital T1 CAS (Robbed Bit Signaling) Works in IOS
Gateways<br>
<a class="moz-txt-link-freetext" href="http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800e2560.shtml">http://www.cisco.com/en/US/tech/tk652/tk653/technologies_tech_note09186a00800e2560.shtml</a><br>
<br>
Configuring and Troubleshooting T1 CAS Signaling<br>
<a class="moz-txt-link-freetext" href="http://www.cisco.com/en/US/tech/tk652/tk653/technologies_configuration_example09186a00801040bc.shtml">http://www.cisco.com/en/US/tech/tk652/tk653/technologies_configuration_example09186a00801040bc.shtml</a><br>
<br>
Basically, you want to do the "debug serial interface" / "show
controller t1" thing (which I think may have been replaced by
something like "show controller t1 cas-data" which will show the RBS
signal states for the A/B (or A/B/C/D) bits. Looking at the bit
states that are coming from the switch should give you some hint as
tohow they have it configured.<br>
<br>
Hth,<br>
<br>
Aaron<br>
<br>
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<div class="moz-cite-prefix">On 11/1/2012 9:19 AM, <a class="moz-txt-link-abbreviated" href="mailto:mays@win.net">mays@win.net</a>
(Joseph Mays) wrote:<br>
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<div><font size="2" face="Arial">Trying to configure a ds0-group
with loop start on a 5400. The t1 in question connects to a
channel bank that breaks the t1 out into individual ds0's. The
problem is that the 5400 is never sending a loop start signal
(0101) to the the channel bank, so the channel bank won't
activate the ds0. Is there any example anywhere of a t1 ds0
group and voice port configuration for loop start that I can
look at to figure out why I can't get this to send a loop
start?</font></div>
<div> </div>
<div><font size="2" face="Arial">Here is the t1 and voice-port so
far.</font></div>
<div> </div>
<div><font size="2" face="Courier New">controller T1 6/6<br>
framing esf<br>
linecode b8zs<br>
ds0-group 1 timeslots 1-24 type sas-loop-start<br>
cas-custom 1<br>
trunk-group WNpots01<br>
description T1 1 to pots01.armplc.win.net channel bank</font></div>
<div> </div>
<div><font size="2" face="Courier New">voice-port 6/6:1<br>
</font></div>
<br>
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