[cisco-voip] Re: Call rings phones once and then drops
Erick Bergquist
erickbe at yahoo.com
Tue Dec 20 23:40:16 EST 2005
I also have seen problems related to MGCP in 12.3(14)T
and 12.4 versions before 12.4(5) - haven't got much
exposure to 12.4(5) yet to see how well it is over
time. I find 12.3(11)T to be pretty stable right now
(T6 and T7) compared to newer versions. I did have big
issues with 12.3(11)T8 and analog FXO ports w/MGCP on
multiple routers but 12.3(11)T7 doesn't appear to have
that problem. 12.3(11)T8 also seems to be okay with
PRIs and MGCP.
Just my 2 cents...
--- Serg <c719562 at gmail.com> wrote:
> Hi TechGuy,
> Not sure if you have already
> rectified this problem but i
> can let you know that I had exactly the same problem
> about 6 month ago with
> a Cisco 3845 + NM-HDV2 + PVDM-32 x 2.
>
> At the time I was running IOS 12.3.14T2 IP-voice
> Feature set. Looking at
> your "debug isdn q931" debug, the cause code is
> exactly the same as what I
> had.
>
> Basically, the problem is to do with the E1/T1
> controller's clocking getting
> out of sync with the Carrier's T1/E1. If you do a
> "show controllers e1" and
> check whether you have excessive Line Code
> Violations (LCVs), Path Code
> Violations (PCV), Slip Secs, etc. These should be
> minimal.
>
> Cisco may point you to the following BugID but I can
> assure that the work
> around did nothing to fix my problems.
>
>
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCef89288
>
> Make sure that you follow the "Clocking
> Configurations On Voice-Capable
> IOS-Based Platforms" (
>
http://www.cisco.com/en/US/products/hw/routers/ps259/products_tech_note09186a008031a072.shtml
> ).
>
> Also make sure you follows the "Configuring MGCP PRI
> Backhaul and T1 CAS
> Support for Cisco CallManager" (
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/callc_c/ccm_c/intcnf3.htm)
> and that you do not add the "application mgcpapp"
> command to dial peers that
> support PRI backhaul.
>
> Lastly, the most important step that I undertook was
> to roll-back (yes,
> beleive it or not) to IOS 12.3.11T6 IP-Voice or
> above and I've never had any
> problems since.
>
> Hope this helps, other Cisco Bugs of interest are:
>
>
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCEG90199
>
>
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCEG89017
>
> Good Luck,
>
> Serg
>
>
> On 12/19/05, cisco-voip-request at puck.nether.net <
> cisco-voip-request at puck.nether.net> wrote:
> >
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> > Today's Topics:
> >
> > 1. Call rings phones once and then drops
> (TechGuy)
> > 2. Re: Call rings phones once and then drops
> (TechGuy)
> > 3. RE: Call rings phones once and then drops
> (Mark Snow)
> > 4. Tech Prefix from ATA186 (Ciscozest)
> > 5. Re: Call rings phones once and then drops
> (Teodor Georgiev)
> >
> >
> >
>
----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Sat, 17 Dec 2005 13:33:40 -0600
> > From: TechGuy <techguy at gmail.com>
> > Subject: [cisco-voip] Call rings phones once and
> then drops
> > To: cisco-voip at puck.nether.net
> > Message-ID:
> >
>
<a1b07ea60512171133i79723eecs2d95643eaa5f034f at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Calls ring in on local PRI trunks on 3845 router,
> makes its way to
> > callmanager, makes its way to phone and rings once
> on the phone. But that
> > is it, calls instantly drop after first ring of
> the phone. Does not give
> > person chance to answer just drops without any
> user intervention.
> >
> > Using MGCP between 3845 and callmanager.
> >
> > Any ideas?
> > -------------- next part --------------
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> > ------------------------------
> >
> > Message: 2
> > Date: Sat, 17 Dec 2005 14:19:32 -0600
> > From: TechGuy <techguy at gmail.com>
> > Subject: Re: [cisco-voip] Call rings phones once
> and then drops
> > To: cisco-voip at puck.nether.net
> > Message-ID:
> >
>
<a1b07ea60512171219p288d1552qddda2d4820ebba47 at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Here is the debug:
> >
> > emb3845#debug isdn q931
> > debug isdn q931 is ON.
> > emb3845#
> > *Dec 17 20:07:23.806: ISDN Se0/1/1:23 Q931: RX <-
> SETUP pd = 8 callref =
> > 0x00D2
> > Bearer Capability i = 0x8090A2
> > Standard = CCITT
> > Transer Capability = Speech
> > Transfer Mode = Circuit
> > Transfer Rate = 64 kbit/s
> > Channel ID i = 0xA98381
> > Exclusive, Channel 1
> > Calling Party Number i = 0x2183,
> '3375015555'
> > Plan:ISDN, Type:National
> > Called Party Number i = 0x80, '4080'
> > Plan:Unknown, Type:Unknown
> > *Dec 17 20:07:24.830: ISDN Se0/1/1:23 Q931: TX ->
> RELEASE_COMP pd = 8
> > callref = 0x80D2
> > Cause i = 0x80A9 - Temporary failure
> > emb3845#
> >
> >
> > More info on the problem. This router has two
> local PRI trunks coming in
> > to
> > a 2MFT card. It also has two CAS (E&M Wink)
> trunks coming into a 2MFT
> > card
> > for long distance and incoming toll free.
> >
> > The two CAS trunks work fine. We are able to get
> incoming calls via the
> > CAS
> > trunks mentioned above with no problems. Also, we
> have another gateway
> > configured on the same callmanager in a similiar
> fashion and all works
> > fine. This was all working earlier this morning.
> No known changes
> > occured
> > between when it worked and stopped working.
> >
> > Quite an interesting problem, we have TAC on the
> line now but thought I
> > would see what others think.
> > -------------- next part --------------
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> > ------------------------------
> >
> >
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