[cisco-voip] Shared line between IP Phones and FXS Port with SCCPsetup and CCM

[Erick Bergquist]

Ok, Thanks. Tried that and all sorts of other stuff, in the end asked
TAC and appears this is working as it was designed.

On the DN settings for the FXS port, if you set the Max Calls and Busy
trigger to 2 (maximum # of calls is 2) then when the you place a call
in to the DN the first time it rings on the IP Phones and FXS port
part of shared line appearance. When the call is answered by IP Phone
and kept active, the FXS port shows offhook even though there is
nothing going on there. Place a second call to the shared DN and the
second call rings on the IP phones and rings the device on the FXS
port (even though port is offhook already), but on the 3rd call in the
IP phones only ring since you've now went past the max # of calls
allowed on the FXS port.

So, thats the way FXS ports as SCCP with CUCM 5.1/6.x works if anyone
was looking at this.


On Mon, Oct 27, 2008 at 7:07 AM, Truelove_John <JTruelove at aetinc.com> wrote:
> Erick,
>
> Try this command:
>
> voice-port 0/1/0
>  timeouts power-denial 1500
>
> We had similar issues with our VG224s and some lines would not release
> the line.
>
> John
>
>
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Erick Bergquist
> Sent: Saturday, October 25, 2008 6:33 PM
> To: cisco-voip mailinglist
> Subject: [cisco-voip] Shared line between IP Phones and FXS Port with
> SCCPsetup and CCM
>
> Hi,
>
> We have a shared extension (2000) across 5 IP Phones and an FXS port
> on a gateway for an overhead bell. The FXS port is configured as SCCP
> with call manager so it can be a shared line. It works fine, and when
> 2000 is called the IP Phones ring as well as the bell but when a IP
> Phone answers, the FXS port stays offhook until the IP Phone caller
> hangs up the call. This means other calls into this extension while
> they have a phone call, the overhead bell doesn't ring. We put a
> regular POTS telephone on the FXS port and when 2000 is called the IP
> Phones ring as well as the regular POTS phone and when IP Phone
> answers, the POTS phone stops ringing but the port on the gateway is
> offhook still. When we lift the handset on the POTS phone it is just
> dead air/silence and no one can hear.
>
> When the port is configured as MGCP, when the IP Phone picks up the
> call the FXS port goes idle and a 2nd/3rd call into the line ring the
> FXS port fine but with MGCP after awhile the port gets hung up due to
> a bug but when we try newer IOS versions where that is supposedly
> fixed the FAX calls stop working due to other bugs.
>
> Just wondering if SCCP should act as same as MGCP with this shared
> line scenario, and why with SCCP the port stays offhook after another
> phone picks up the call to the shared line.
>
> The gateway is a 2800 with a VIC2-FXS and we've tried IOS 12.4(11)T
> through 12.4(20)T with same problem on CCM 5.1(3) and CCM 6.1(2).
> Again, with FXS port configured as MGCP the port goes idle after
> another phone picks up the call on the shared lines.
>
> This is what the FXS port state is after another IP Phone answers the
> call on the shared line, with a regular POTS home phone or the
> overhead bell plugged into it.
>
> Gateway#show voice call summ
> PORT           CODEC     VAD VTSP STATE            VPM STATE
> ============== ========= === ==================== ======================
> 0/1/0         g711ulaw   n  S_SETUP_REQ_PROC      FXSLS_WAIT_OFFHOOK
> _______________________________________________