Cisco Cisco MGX 8880 Media Gateway Notas de publicación
7
Release Notes for Cisco Voice Switch Service Module (VXSM) Release 5.6.00
OL-23364-02
Feature Clarifications
Feature Clarifications
Call Rate Performance Support
VXSM OC3 Card supports the following call rates:
•
In MGCP, the maximum CPS supported is 60 (without signaling). If signaling (M3UA/IUA/RUDP)
is configured, then the maximum supported CPS is 50.
is configured, then the maximum supported CPS is 50.
•
In H.248, the maximum CPS supported is 85 (without signaling). If signaling (M3UA/IUA) is
configured, then the maximum supported CPS is 50.
configured, then the maximum supported CPS is 50.
Online Diagnostics Feature as Applied to VXSM
The online diagnostics feature as implemented on the PXM45 card is supported on VXSM. When
enabled, using the PXM45 cnfdiag command, this feature performs non-intrusive diagnostics tests that
use four of the VXSM G711 DSP resources.
enabled, using the PXM45 cnfdiag command, this feature performs non-intrusive diagnostics tests that
use four of the VXSM G711 DSP resources.
If the user executes the VXSM dspdspcodecpools command, the resulting display shows the four G711
DSP resources being used (for diagnostics) and subtracts them from the remaining available Codecs (see
example below).
DSP resources being used (for diagnostics) and subtracts them from the remaining available Codecs (see
example below).
mgx.3.VXSM.a > dspdspcodecpools
=====================================================================
DSP codec capacity usage
=====================================================================
Codec pool Current utilized Current available
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.