Cisco Cisco MGX 8880 Media Gateway Notas de publicación
5
Release Notes for Cisco Voice Switch Service Module (VXSM) Release 5.0.02
Part Number OL-6224-01 Rev. A0, September 1, 2004
VXSM Management Information Base
MGX8850.9.VXSM.a > dspdspcodecpools
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DSP codec capacity usage
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Codec pool
Current utilized
Current available
capacity (#calls) capacity (#calls)
==========
================= =================
G711 family
4
8060
G729/G726/T.38 family
0
4030
The online diagnostics feature does not reduce the maximum number of 8064 codecs available for calls
on the VXSM card. If the number of call requests on the VXSM is sufficiently high, the online diagnostic
feature is disabled automatically and the four codecs are made available for active calls.
on the VXSM card. If the number of call requests on the VXSM is sufficiently high, the online diagnostic
feature is disabled automatically and the four codecs are made available for active calls.
DSP Resources under Mixed Codec Conditions
When the same codec is used to setup calls on the gateway the available DSP resources will be fully
utilized. However when different codecs are used to setup calls the amount of utilizable DSP resources
may be limited in certain cases due to fragmentation.
utilized. However when different codecs are used to setup calls the amount of utilizable DSP resources
may be limited in certain cases due to fragmentation.
Fragmentation is said to have occurred when the available capacities on two different DSP resources
have enough available capacity to support a call of a particular codec type but cannot support that codec
type individually.
have enough available capacity to support a call of a particular codec type but cannot support that codec
type individually.
Consider two DSP resources whose available capacity is 1 unit each making the total available capacity
2 units. However a codec that requires 2 units cannot be supported in the system because the available
capacities have been fragmented across the individual DSP resources.
2 units. However a codec that requires 2 units cannot be supported in the system because the available
capacities have been fragmented across the individual DSP resources.
The DSP allocation algorithm on VXSM does make an attempt to smooth the effects of fragmentation
but towards the end, fragmentation could happen as the future pattern of calls cannot be predicted
beforehand.
but towards the end, fragmentation could happen as the future pattern of calls cannot be predicted
beforehand.
Configuring Switching and Trunking Modes
The simultaneous operation of mixed application modes (Switched VoIP applications and Non-switched
Trunking applications) is not supported on a VXSM card. However, both modes can be supported in the
Media Gateway by using multiple VXSM cards.
Trunking applications) is not supported on a VXSM card. However, both modes can be supported in the
Media Gateway by using multiple VXSM cards.
VXSM Management Information Base
The VXSM Management Information Base (MIB) Version 5.0.02 is available by request through your
Cisco VXSM product marketing representative.
Cisco VXSM product marketing representative.
Compatibility
Note
VXSM Release 5.0.02 is only supported with PXM-45.