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DSP Allocation: I need help understanding..

I have a 3845.

When I do a "show inventory" i see:

Admin-3845#show inventory

NAME: "3845 chassis", DESCR: "3845 chassis"

PID: CISCO3845         , VID: V01 , SN: FTX12

NAME: "c3845 Motherboard with Gigabit Ethernet on Slot 0", DESCR: "c3845 Motherboard with Gigabit Ethernet"

PID: CISCO3845-MB      , VID: V07 , SN: FOC12

NAME: "PVDMII DSP SIMM with four DSPs on Slot 0 SubSlot 4", DESCR: "PVDMII DSP SIMM with four DSPs"

PID: PVDM2-64          , VID: V01 , SN: FOC12

NAME: "PVDMII DSP SIMM with four DSPs on Slot 0 SubSlot 5", DESCR: "PVDMII DSP SIMM with four DSPs"

PID: PVDM2-64          , VID: V01 , SN: FOC12

NAME: "High Density Voice2 Network module with on board two port interface  on Slot 1", DESCR: "High Density Voice2 Network module with on board two port interface "

PID: NM-HDV2-2T1/E1    , VID: V05 , SN: FOC12

NAME: "PVDMII DSP SIMM with four DSPs on Slot 1 SubSlot 2", DESCR: "PVDMII DSP SIMM with four DSPs"

PID: PVDM2-64          , VID: V01 , SN: FOC12

NAME: "PVDMII DSP SIMM with four DSPs on Slot 1 SubSlot 3", DESCR: "PVDMII DSP SIMM with four DSPs"

PID: PVDM2-64          , VID: V01 , SN: FOC12

NAME: "High Density Voice2 Network module with on board two port interface  on Slot 2", DESCR: "High Density Voice2 Network module with on board two port interface "

PID: NM-HDV2-2T1/E1    , VID: V05 , SN: FOC12

NAME: "PVDMII DSP SIMM with four DSPs on Slot 2 SubSlot 2", DESCR: "PVDMII DSP SIMM with four DSPs"

PID: PVDM2-64          , VID: V01 , SN: FOC12

NAME: "PVDMII DSP SIMM with four DSPs on Slot 2 SubSlot 3", DESCR: "PVDMII DSP SIMM with four DSPs"

PID: PVDM2-64          , VID: V01 , SN: FOC12

Admin-3845#

From this information I can see i have 6 x PVDM2-64 modules. 2 on each NM-HDV2-2T1/E1 and 2 on the motherboard. Correct?
Here is my running config:
!
isdn switch-type primary-ni
!
voice-card 0
dsp services dspfarm
!
voice-card 1
!
voice-card 2
!
!
controller T1 1/0
pri-group timeslots 1-24 service mgcp
description ***ATT
!
controller T1 1/1
!
controller T1 2/0
clock source internal
pri-group timeslots 1-24 service mgcp
description ***ATT
!
controller T1 2/1
!
dspfarm profile 10 conference
codec g711ulaw
codec g711alaw
codec g729ar8
codec g729abr8
codec g729r8
codec g729br8
maximum sessions 16
associate application SCCP
Why am I only allowed to have a max sessions of 16 on profile 10? Why can't I add another profile doing transcoding? It gives me <0-0> when I type "maximum sessions ?".
Thanks for any help,
JJ

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