Cisco Cisco MGX 8880 Media Gateway Notas de publicación
7
Release Notes for Cisco Voice Switch Service Module (VXSM) Release 5.6.10
OL-23364-03
VXSM Management Information Base
capacity (#DSP chans) capacity (#DSP chans)
========== ===================== =====================
G711 family/HDLC 179 7885
G729/G726/T.38 family 0 3919
G723 family 0 2911
In this example, 175 G711 calls have been established along with four G711 resources used for
diagnostics.
diagnostics.
The online diagnostics feature does not reduce the maximum number of 8064 G711 DSP resources
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.
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.
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 resource 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 resource 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.
Fragmentation can happen because the pattern of future calls cannot be predicted beforehand.
Fragmentation can happen because the pattern of future calls cannot be predicted beforehand.
VXSM Management Information Base
The VXSM Management Information Base (MIB) Version 5.6.10 is available to users with CCO
accounts who can access the MIB and VXSM software on-line at:
accounts who can access the MIB and VXSM software on-line at:
Step 1
Log on to
Step 2
Locate the VXSM platform (either VXSM 8880 or VXSM 8850) and click the down arrow to expand the
“Select Release Level” drop down menu.
“Select Release Level” drop down menu.
Step 3
Select the desired MIB release level (for example, Release 5500) to display a list of downloadable files.
Step 4
Click on the desired file (for example, mgx8850-fw-5500.tar).
Step 5
Read the license agreement and, if approved, click Accept.
Step 6
In the Software Download dialog box, click on Download: filename (where filename is the name of the
file selected for download). This step starts the download procedure.
file selected for download). This step starts the download procedure.
Step 7
Follow the normal file download procedure for your computer.
Step 8
When the file has been downloaded, untar or unzip the downloaded file. The MIB file is included in the
downloaded file and is listed as a tar file (for example mgx8850rel5500mib.tar).
downloaded file and is listed as a tar file (for example mgx8850rel5500mib.tar).