DSP Resources
DSP cards provide digital signal processor (DSP) resources, and the PBX uses the resources to perform
various PBX operations. The following illustration shows the concept of DSP resource usage. More complex
situations may require additional resources, and in some cases the amount of DSP resources required may
be less than expected.
Conference
0.5
Outgoing Message
(DISA)
*3
2
1
Music on Hold (MOH)/
External Paging (EPG)
*3
1
Internal MOH
*3
Unified Messaging
1.3
PBX
Doorphone
*2
3
1
Analogue
Trunk
*2
2.2
G.729A
G.711
1
IP Trunk
*1
2.2
G.729A
G.711
1
IP-PT
1
SLT
*2
1
PRI/E1
*2
: Required DSP Resources
UM Tone Generator
2
Echo Canceller
*3
3
2.2
G.729A
G.711
1
IP-CS
PS
DPT/APT
*2
1
*1
Connections that arrive over a stacking connection require the same amount of DSP resources as shown in this example.
*2
DSP resources are used during conversations between legacy trunks/extensions/Doorphones and IP trunks/extensions.
*3
DSP resources are used when IP trunks or IP extensions access these devices.
Required DSP Resources Assessment
The maximum number of simultaneous calls, operations and features using IP protocols is determined by the
DSP card installed in the PBX.
To decide how much resources are required for the PBX, the DSP Resource Advisor can be useful.
Note
•
Calls cannot be made or received when all of the DSP resources are being used.
44
Installation Manual
2.3.3 System Capacity
Summary of Contents for KX-NS500AG
Page 21: ...21 KX NS500AG 5 Location of Controls and Components 5 1 Name and Locations ...
Page 24: ...24 KX NS500AG 9 1 1 Startup ...
Page 25: ...25 KX NS500AG ...
Page 26: ...26 KX NS500AG ...
Page 27: ...27 KX NS500AG ...
Page 28: ...28 KX NS500AG 9 1 2 Battery Alarm ...
Page 29: ...29 KX NS500AG 9 1 3 Using Voice Mail ...
Page 30: ...30 KX NS500AG Using Voice Mail continued ...
Page 34: ...34 KX NS500AG 9 2 3 41V are Not Output Only 15V is output ...
Page 35: ...35 KX NS500AG 9 2 4 Battery Backup Function Does Not Operate PSU can Not Charge Batteries ...
Page 43: ...43 KX NS500AG 11 3 3 Power Supply Board ...
Page 59: ...59 KX NS500AG 12 2 Memo ...
Page 73: ...73 KX NS500AG 12 5 Memo ...
Page 131: ...131 KX NS500AG 16 Appendix ...