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<DIV><FONT face=Arial size=2>Thanks Nick. So then this is more of a concern when
you are connecting to different carriers? I would suspect that unless you are in
a big city or have diverse path circuits, chances are, one provider will have
one clock since your circuits are from the same switch.</FONT></DIV>
<DIV> </DIV>
<DIV>--------------------------------------------------------------------------------<BR>Lelio
Fulgenzi, B.A.<BR>Senior Analyst (CCS) * University of Guelph * Guelph, Ontario
N1G 2W1<BR>(519) 824-4120 x56354 (519) 767-1060 FAX
(JNHN)<BR>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
<BR>"Bad grammar makes me [sic]" - Tshirt<BR></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=nick.jon.griffin@gmail.com
href="mailto:nick.jon.griffin@gmail.com">Nick Griffin</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=gusangjung@yahoo.com
href="mailto:gusangjung@yahoo.com">Gu Sang Jung</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=lelio@uoguelph.ca
href="mailto:lelio@uoguelph.ca">Lelio Fulgenzi</A> ; <A
title=voicenoob@gmail.com href="mailto:voicenoob@gmail.com">Voice Noob</A> ;
<A title=m.rabinovich@nves.ca href="mailto:m.rabinovich@nves.ca">Mordechai</A>
; <A title=cisco-voip@puck.nether.net
href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, August 27, 2008 7:39
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [cisco-voip] Maximum number
of T1 on 3845</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>I see your point on the 10 PRI circuits. Below is a great
clocking discussion from Derick Winkworth post on the voip-forum titled
"network-clock-participate" subject that I think Gu Sang is trying to hit on.
The logic surrounding his description seems to apply to this
discussion:<BR><BR>Quote:<BR><BR>
<P>In telco-land, there is the idea that all network switches are synchronized
to the same clock. This is achieved by planning how a clock is
distributed through your network. The idea is that there is one clock
device in a network switch, called a PLL (phase-lock loop). The
PLL will receive/recover the master clock on one of its bearer ports, or
on a dedicated clock port called a BITS port.</P>
<P> </P>
<P>All other ports on that switch/device will be timed using this master
clock.</P>
<P> </P>
<P>Cisco's ISRs were built using this model. There is one PLL on the
motherboard, called the network-clock. Modules on your router may
participate in this clocking scheme or not. Some have to, because they
don't have their own PLLs/clocks on-board. When you need/want a module
to participate in the network clock, you use the network-clock-select
command. You select the master clock with the network-clock-select
command. You can choose multiple master clocks and order them by
priority. Only one is active at a time.</P>
<P> </P>
<P>The implication here is that if you connect to multiple carriers (and thus
multiple clock domains), you may/will end up with clock slips on one of the
ports. Otherwise, you would set the telco port as the master clock and
then time the rest of your private ports off of this. You may need
to do this if you want the ISR to do TDM switching, for instance.</P>
<P>End Quote<BR></P><BR><BR>
<DIV class=gmail_quote>On Tue, Aug 26, 2008 at 7:08 PM, Gu Sang Jung <SPAN
dir=ltr><<A
href="mailto:gusangjung@yahoo.com">gusangjung@yahoo.com</A>></SPAN>
wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<DIV>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: arial,helvetica,sans-serif">
<DIV>This is my two cents.<BR><BR>The problem to load more than 10 PRIs will
be timing issue.<BR><BR>the currently. Cisco 3845 only support 10 Time clock
domain. <BR>Hence, I designed to use only to max 10 PRIs into One 3845. If
you have different telco clock on one 3845, these number should be limited
with telco<BR>If you provide clock from telco switch, Please make sure this.
Otherwise, Fax, or Modem could be has issue. <BR></DIV>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: arial,helvetica,sans-serif"><BR>
<DIV
style="FONT-SIZE: 12pt; FONT-FAMILY: times new roman,new york,times,serif">
<DIV class=Ih2E3d>----- Original Message ----<BR>From: Lelio Fulgenzi <<A
href="mailto:lelio@uoguelph.ca"
target=_blank>lelio@uoguelph.ca</A>><BR>To: Voice Noob <<A
href="mailto:voicenoob@gmail.com" target=_blank>voicenoob@gmail.com</A>>;
Mordechai <<A href="mailto:m.rabinovich@nves.ca"
target=_blank>m.rabinovich@nves.ca</A>><BR>Cc: <A
href="mailto:cisco-voip@puck.nether.net"
target=_blank>cisco-voip@puck.nether.net</A><BR></DIV>
<DIV>
<DIV></DIV>
<DIV class=Wj3C7c>Sent: Tuesday, August 26, 2008 3:57:47 PM<BR>Subject: Re:
[cisco-voip] Maximum number of T1 on 3845<BR><BR>
<DIV><FONT face=Arial size=2><A
href="http://www.cisco.com/en/US/prod/collateral/routers/ps259/product_data_sheet0900aecd8057f2e0.pdf"
target=_blank
rel=nofollow>http://www.cisco.com/en/US/prod/collateral/routers/ps259/product_data_sheet0900aecd8057f2e0.pdf</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>i was referred to this by our SE. although the
table says the 3845 will support 24 T1/PRI ports, the max simultaneous
calls shows about 450 which is just under 20 ports (when dividing by 23,
just under 19 when dividing by 24).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>hope this helps.</FONT></DIV>
<DIV> </DIV>
<DIV>--------------------------------------------------------------------------------<BR>Lelio
Fulgenzi, B.A.<BR>Senior Analyst (CCS) * University of Guelph * Guelph,
Ontario N1G 2W1<BR>(519) 824-4120 x56354 (519) 767-1060 FAX
(JNHN)<BR>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
<BR>"Bad grammar makes me [sic]" - Tshirt<BR></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(0,0,0) 2px solid; MARGIN-RIGHT: 0px">
<DIV
style="FONT: 10pt arial; font-size-adjust: none; font-stretch: normal">-----
Original Message ----- </DIV>
<DIV
style="BACKGROUND: rgb(228,228,228) 0% 50%; FONT: 10pt arial; font-size-adjust: none; font-stretch: normal; moz-background-clip: -moz-initial; moz-background-origin: -moz-initial; moz-background-inline-policy: -moz-initial"><B>From:</B>
<A title=voicenoob@gmail.com href="mailto:voicenoob@gmail.com"
target=_blank rel=nofollow>Voice Noob</A> </DIV>
<DIV
style="FONT: 10pt arial; font-size-adjust: none; font-stretch: normal"><B>To:</B>
<A title=m.rabinovich@nves.ca href="mailto:m.rabinovich@nves.ca"
target=_blank rel=nofollow>Mordechai</A> </DIV>
<DIV
style="FONT: 10pt arial; font-size-adjust: none; font-stretch: normal"><B>Cc:</B>
<A title=cisco-voip@puck.nether.net
href="mailto:cisco-voip@puck.nether.net" target=_blank
rel=nofollow>cisco-voip@puck.nether.net</A> </DIV>
<DIV
style="FONT: 10pt arial; font-size-adjust: none; font-stretch: normal"><B>Sent:</B>
Tuesday, August 26, 2008 5:54 PM</DIV>
<DIV
style="FONT: 10pt arial; font-size-adjust: none; font-stretch: normal"><B>Subject:</B>
Re: [cisco-voip] Maximum number of T1 on 3845</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>No they don't. Where in the world did you get that
from????<BR><BR>
<DIV class=gmail_quote>On Tue, Aug 26, 2008 at 4:47 PM, Mordechai <SPAN
dir=ltr><<A href="mailto:m.rabinovich@nves.ca" target=_blank
rel=nofollow>m.rabinovich@nves.ca</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">3845
supports at least 16, more likely 24 pris if I remember right. We
chose<BR>them over 6509e with CMM blades because they provided
appropriate density<BR>and a newer voip platform.<BR>
<DIV>
<DIV></DIV>
<DIV><BR>-----Original Message-----<BR>From: <A
href="mailto:cisco-voip-bounces@puck.nether.net" target=_blank
rel=nofollow>cisco-voip-bounces@puck.nether.net</A><BR>[mailto:<A
href="mailto:cisco-voip-bounces@puck.nether.net" target=_blank
rel=nofollow>cisco-voip-bounces@puck.nether.net</A>] On Behalf Of
Matthew Saskin<BR>Sent: Tuesday, August 26, 2008 3:25 PM<BR>To: Voice
Noob<BR>Cc: <A href="mailto:cisco-voip@puck.nether.net" target=_blank
rel=nofollow>cisco-voip@puck.nether.net</A><BR>Subject: Re: [cisco-voip]
Maximum number of T1 on 3845<BR><BR>For one particular client I've got a
series of 8 x 3845's with 12 PRI's<BR>+ 230 configured xcoding sessions
per device and no cpu/memory issues to<BR>speak of. Nominal CPU
utilization is around 35% with peaks of about 50%<BR>during peak call
times.<BR><BR>-matt<BR><BR>Voice Noob wrote:<BR>><BR>> I think
that device will support 12 or 14 PRI's. Don't remember off
hand.<BR>> On Tue, Aug 26, 2008 at 11:20 AM, Aman Chugh <<A
href="mailto:aman.chugh@gmail.com" target=_blank
rel=nofollow>aman.chugh@gmail.com</A><BR>> <mailto:<A
href="mailto:aman.chugh@gmail.com" target=_blank
rel=nofollow>aman.chugh@gmail.com</A>>>
wrote:<BR>><BR>><BR>> Just wanted to know if I
can have 8 T1 pri terminate on Cisco 3845 ,<BR>> any
one already doing the same , any caveats that I need to be aware<BR>>
of , apart from the AS5300/5400 , what are my other
options to<BR>> terminate 8 T1 on a single router, I am
putting in 6 PVDM2-64 to<BR>> support this
configuration.<BR>><BR>><BR>>
Aman<BR>><BR>>
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