Erwin,  You see below that you may have Channels 1-3 on the PSTN
configured... but the 6608 is still going bottom up be default and trying
channel 23...

Bearer Capability i = 0x8090A2
  Standard = CCITT
  Transfer Capability = Speech
  Transfer Mode = Circuit
  Transfer Rate = 64 kbit/s
 Channel ID i = 0xA98397
  Exclusive, Channel 23
 Calling Party Number i = 0x0081, '1006'
  Plan:Unknown, Type:Unknown
 Called Party Number i = 0x80, '911'
  Plan:Unknown, Type:Unknown
Jan  9 14:14:53.614: %ISDN-6-CHAN_UNAVAILABLE: Interface Se0/3/0:23
Requested Channel 23 is
not available
Jan  9 14:14:53.614: ISDN Se0/3/0:23 **ERROR**: CCPMSG_InCall: Channel_ID IE
invalid 44
(0x2C)
Jan  9 14:14:53.614: ISDN Se0/3/0:23 **ERROR**: CCPMSG_InCall: rejecting
call
Jan  9 14:14:53.614: ISDN Se0/3/0:23 Q931: TX -> RELEASE_COMP pd = 8
callref = 0x8006


You need to do exactly with Ryan Hicks states in previous reply.

Thanks,
Ryan Trauernicht

On Sat, Jan 10, 2009 at 9:54 AM, Ryan Hicks <[email protected]> wrote:

> Erwan,
>
> If this is the 6608. For fractional PRI you have to set the status poll
> check box in the gateway. Then under services, call manager, click the
> advanced button, then search for b channel maintenance. You put the mgcp
> name of the 6608 gateway (you can get the name on the gateway page) then
> busyout your non used channels.
> mgcp-gateway-name = 0001 1111 1111 1111 1111 1111 where 0 is in service and
> 1 is out of service. The d channel is also marked with a 1.
>
> This way, when you route calls bottom up (descending), because the Telco is
> sending in Top Down (ascending) and you more than likely be told to avoid
> glare, the CM will know that the upper channels are not in service and to
> send the call out the first available channel. The third channel instead of
> the 23rd. The other side (the telco more than likely) has 23-4 shut down.
>
> Ryan
>
> --- On *Fri, 1/9/09, Erwan Erwan <[email protected]>* wrote:
>
> From: Erwan Erwan <[email protected]>
> Subject: [OSL | CCIE_Voice] Requested circuit/channel not available on PSTN
> GW ?
> To: [email protected]
> Date: Friday, January 9, 2009, 6:34 PM
>
>
> hi,
>
> I made the test call to 911, from HQ phone, but the call failed in PSTN GW
>
> here is the error message in  PSTN GW ,
> *Cause i = 0x82AC18 - Requested circuit/channel not available*
>
> ---------------------------------------
> 9 14:14:53.610: ISDN Se0/3/0:23 Q931: RX <- SETUP pd = 8  callref = 0x0006
>  Bearer Capability i = 0x8090A2
>   Standard = CCITT
>   Transfer Capability = Speech
>   Transfer Mode = Circuit
>   Transfer Rate = 64 kbit/s
>  Channel ID i = 0xA98397
>   Exclusive, Channel 23
>  Calling Party Number i = 0x0081, '1006'
>   Plan:Unknown, Type:Unknown
>  Called Party Number i = 0x80, '911'
>   Plan:Unknown, Type:Unknown
> Jan  9 14:14:53.614: %ISDN-6-CHAN_UNAVAILABLE: Interface Se0/3/0:23
> Requested Channel 23 is
> not available
> Jan  9 14:14:53.614: ISDN Se0/3/0:23 **ERROR**: CCPMSG_InCall: Channel_ID
> IE invalid 44
> (0x2C)
> Jan  9 14:14:53.614: ISDN Se0/3/0:23 **ERROR**: CCPMSG_InCall: rejecting
> call
> Jan  9 14:14:53.614: ISDN Se0/3/0:23 Q931: TX -> RELEASE_COMP pd = 8
> callref = 0x8006
>  Cause i = 0x82AC18 - Requested circuit/channel not available
>
>

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