2801 CME and ressource DSP, problem with incoming call

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Jul 27th, 2006
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Hello, I have a problem with 2801 CME :

1 terminal line

1 Channelized E1/PRI port

1 DSP, 8 Voice resources

1 cisco service engine(s)

But only the first 8 channels work properly for incoming call. After I have this log :

"Jul 27 10:02:45.958: ISDN Se0/1/0:15 Q931: RX <- SETUP pd = 8 callref = 0x01EB

Sending Complete

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA9838A

Exclusive, Channel 10

Calling Party Number i = 0x2083, 'XXXXXXXXX'

Plan:Unknown, Type:National

Called Party Number i = 0x81, '0730'

Plan:ISDN, Type:Unknown

Jul 27 10:02:45.958: %ISDN-6-CHAN_UNAVAILABLE: Interface Se0/1/0:15 Requested Channel 10 is not available

Jul 27 10:02:45.962: ISDN Se0/1/0:15 **ERROR**: CCPMSG_InCall: Channel_ID IE invalid 44 (0x2C)

Jul 27 10:02:45.962: ISDN Se0/1/0:15 **ERROR**: CCPMSG_InCall: rejecting call

Jul 27 10:02:45.962: ISDN Se0/1/0:15 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x81EB

Cause i = 0x80AC18 - Requested circuit/channel not available"


How can resolve my problem? Can I restrict incoming channel ressource?


Thanks,

fab

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Steven Landon Thu, 07/27/2006 - 19:54
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Fab,


When the PRI was originally configured, you probably ran into an error when you created your pri-group that said you could only enable 8 channels. When you got that error, you probably just re-typed it using 1-8 instead of 1-24. When you did that, you only enabled the 8 channels.


The router will not allow you to configure more active voice ports than it's DSP resources will support. You have to buy more DSPs or tell your provider to busy out all but the first 8 channels.


Steve

Tony Huynh Sun, 07/30/2006 - 10:12
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Hi Fab,


Can you please perform "show isdn service". This will tell how many channels that your t1 pri has in service.

In order to take certain channels out of service, you can use the following command underneath the D channel:


eg.

int serial 1/0:23

isdn service b_channel 13-24 state 2


This command essential takes channels 12-24 out of service.


HTH

Tony

h.fabien_mt Mon, 07/31/2006 - 05:28
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Hi Tony,

Result of "show isdn service":

ISDN Se0/1/0:15, Channel [1-31]

Configured Isdn Interface (dsl) 0

Channel State (0=Idle 1=Proposed 2=Busy 3=Reserved 4=Restart 5=Maint_Pend)

Channel : 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

State : 0 0 0 0 0 0 0 0 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3

Service State (0=Inservice 1=Maint 2=Outofservice 8=MaintPend 9=OOSPend)

Channel : 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

State : 0 0 0 0 0 0 0 0 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2


When I try the command "isdn service b_channel 9-15 state 2"

I have this error :


Jul 31 13:25:28.785: ISDN Se0/1/0:15 CC: process_isdn_service_state: dsl 0 bchan_num 9, bchan_last 15, bchan_opt 0002 state 2, locale 0

Jul 31 13:25:28.785: ISDN Se0/1/0:15 **ERROR**: process_isdn_service_state: bchan idb 00000000 isdn_info 00000000, nfas_int 0 bchan 9


And for incoming call, I have always pb :

Jul 31 13:26:20.321: ISDN Se0/1/0:15 CC: CCPRI_Go: source id 0x300, call id 0xE, event 0x341 (pre-ccb recovery)

Jul 31 13:26:20.321: ISDN Se0/1/0:15 CC: CCPRI_Go: call id 0x0 cref 0xE event 0x821A Source->L3

Jul 31 13:26:20.321: ISDN Se0/1/0:15 CC: CCPCC_CallIdle: event 0x90 b channel 0 nfas int_id 0 call_id 0xE

Jul 31 13:26:20.321: ISDN Se0/1/0:15 CC: CCPRI_AcceptChanId: Negotiated int_id 0 bchan 0 cref 0x821A call_id 0x000E lo_chan 15 final int_id/bchan 0/15 cause 44

Jul 31 13:26:20.321: %ISDN-6-CHAN_UNAVAILABLE: Interface Se0/1/0:15 Requested Channel 15 is not available

Jul 31 13:26:20.321: ISDN Se0/1/0:15 **ERROR**: CCPMSG_InCall: Channel_ID IE invalid 44 (0x2C)

Jul 31 13:26:20.321: ISDN Se0/1/0:15 **ERROR**: CCPMSG_InCall: rejecting call

Tony Huynh Mon, 07/31/2006 - 07:46
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Hi, it appears that what is negotiated between your gateway and the pbx is that those particular channels are out of service. Unless you specifically configure those channels out of service on the D channel, then it is the switch that may be reporting those channels in that state. If the gateway does not have enough dsp resources, it will give you an error stating "not enough dsp resources" when you configure the t1 pri for the first time. A good test would be to reconfigure th e t1 pri with no a certain amount of known good channels and see if they still fail.



h.fabien_mt Tue, 08/01/2006 - 04:41
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Hello,

When I try to use a 1/2 E1 :

int s0/1/0:15

pri-group timeslots 1-16

% Not enough DSP resources available to configure pri-group on controller E1 0/1/0

% The remaining dsp resources are enough for 8 time slots.

% For current codec complexity, 1 extra dsp(s) are required to create this voice port.


So to solve my problem, I try to use 1/4 E1 :

pri-group timeslots 1-8

For outgoing call no problem. For incoming call, the router use channel 1 to 15... But 9 to 15 doesn't work. My pbx is ccme on the router.

Thank a lot for all your response.

fab

DRAGI RADOVANOVIC Tue, 08/01/2006 - 11:51
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fab,

other guys have said this already. you need more pvdms to have more b channels configured. if you have a full E1 you have to have 1 dsp resource for every b channel. nothing else will work, period.

dragi

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