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Hi Greg,<br>
<br>
One bite at a time. Inline, ws.<br>
<br>
Gregory Wenzel wrote:
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<div>I have a client with approx 1000 phones and is about to do an
office job on this legacy system. He is stuck on sip, why I have no
clue </div>
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ws: yep, hear this frequently. "We want SIP!"<br>
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<div>but most likely he wants to use cucm8.5 with cheap sip phones </div>
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ws: 3rd party SIP phones will have to provisioned by whatever means
they offer. With Cisco phones doing SIP we use vendor extensions so
that SIP phone user experience is nearly seemless compared to SCCP
phone user experience. It is not yet possible to do all of the
features in fully "standardized" (not really a standard) SIP. For a
start toward the details try the SIP line side messaging guide:<br>
<a class="moz-txt-link-freetext" href="http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/sip_msg/line_std/8_0_1/siplst801.pdf">http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/sip_msg/line_std/8_0_1/siplst801.pdf</a><br>
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<div>besides his service provider telling him he should go all sip
and run g729 on-net is not such a great advice, that will only save him
in the shortrun with purchasing dsp modules. They have no bandwidth
issue haveing a comcast tls 100mb link betw the two sites and a few
satelite offices in the philly area. Not ever having built a purely sip
system. They have 3 pri's now and I dont see them needing to run g729
onnet and loose that sound quality.</div>
<div> </div>
<div>What does it mean when you have to build the dial plan?</div>
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ws: SIP endpoints each need local instruction on what to do with
digits. With Cisco CM and Cisco SIP phones phones default to 'send
everything to the server' so the server still performs central
routing. You can get creative with routing at the endpoints similar to
host based routing if you have an IP background. Normal conditions
apply, just because you can doesn't mean you should.<br>
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<div> and a sip profife for each phone? </div>
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ws: yep, pretty much every phone gets a profile. look for good bulk
provisioning in the phones.<br>
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<div>im embarassed to even ask that but wanted some clairfication
from anyone on the group for the dial plan question and besides video
advantage not working yet with sip phones what are the other features
that do not work yet?</div>
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ws: Now it feels like we've jumped back to Cisco CM + Cisco phones.
The last SIP/SCCP comparison I saw was here:<br>
<br>
Note, if you deploy Cisco CM + Cisco phones the SIP experience can be
very similar to SCCP experience for both user and administrator.
However, this is only by vendor extension. Cisco CM with "basic sip
device" offers very basic features. That said feature support varies
even within Cisco phone models. Check the Administration Guide for
each model phone (or get your account team to compile?) to verify
details. Example:<br>
<a class="moz-txt-link-freetext" href="http://www.cisco.com/en/US/customer/docs/voice_ip_comm/cuipph/7975G_7971g-ge_7970g_7965g_7945g/8_0/english/administration/guide/7970dif.html">http://www.cisco.com/en/US/customer/docs/voice_ip_comm/cuipph/7975G_7971g-ge_7970g_7965g_7945g/8_0/english/administration/guide/7970dif.html</a><br>
<br>
/Wes<br>
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<div> </div>
<div> </div>
<div>even a link to the answer would help or a kick in the butt
right direction would be great</div>
<div> </div>
<div> </div>
<div>Regards,</div>
<div> </div>
<div>Greg</div>
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