by Olivier | Mar 2, 2010 | CUCM, Lab, Non classé, Written Theory
Music on Hold is a feature that consists of streaming music and relies on the Cisco IP Voice Media Streaming Application.
If a device must access a MOH server , then it must be configured under its MRG/MRGL.
Cisco IP Voice Media Streaming Application also provides Software Annunciator, Software Conference Bridge and MTP resources. Once this service is started under the Control Center, all previous application are enabled.
Cisco’s recommandation is to not run the Cisco IP Voice Media Streaming service on a server where you perform already call-processing as it can require high CPU overhead.
A Maximum of 51 audio sources can be configured across the cluster (50 in the form of audio files and 1 fixed audio source(usually a soundcard inside the server)).
MOH servers msut register with Call Manager and they communicate with it using SCCP.
by Olivier | Mar 2, 2010 | CUCM, Lab, Non classé, SIP, Written Theory
Since Call Manager 4.X, SIP Trunks can be used for connectivity with SIP Networks and devices via a SIP Proxy Servers.
A SIP Proxy can handle SIP Request , Authentication and Authorization of users and will implement policies and features
by Olivier | Mar 2, 2010 | H.323, IOS, Lab, Non classé, Written Theory
Here is a basic definition for the gatekeeper config:
!
gatekeeper
zone local oks ksiazek.be 10.0.0.1 1719
zone prefix oks 1234*
gw-type-prefix 1#* default-technology
bandwidth total zone oks 1024
bandwidth session zone oks 128
no shutdown
!
The zone local defines the Gatekeeper’s name , the domain to which it belongs and its IP Address and the TCP port used.
The zone prefix specifies the Gatekeeper’s name and the prefix associated within the zone list.
The gw-type-prefix will help to route calls if the called number doesn’t correspond to an E.164 number.
The bandwidth total zone defines the maximum aggregate bandwidth that you can use within this specific zone.
The bandwidth session zone defines the maximum bandwidth available for a session in the zone ( so this is the bandwidth for a call)
No shut activates the Gatekeeper’ configuration.
by Olivier | Feb 27, 2010 | IOS, Lab, Non classé, QOS, Written Theory
Queuing issometimes reerredto as congestion management as it identifies how trafic from multiple streams is sent out of an interface which is currentlyexperiencing congestion.
In other words, the queuing is the fact that a device( router or switch) will attempt to bufferize the extra traffic until the bandwidth will be available again
by Olivier | Feb 27, 2010 | IOS, Lab, Non classé, QOS, Written Theory
Here are the default values for the mapping until you decide to change it
First let’s see the CoS-to-DSCP mapping
- CoS 0 => DSCP 0
- CoS 1 => DSCP 8
- CoS 2 => DSCP 16
- CoS 3 => DSCP 24
- CoS 4 => DSCP 32
- CoS 5 => DSCP 40
- CoS 6 => DSCP 48
- CoS 7 => DSCP 56
After let see the reverse side with the DSCP-to-CoS mapping
- DSCP 0 => CoS 0
- DSCP 8,10 => CoS 1
- DSCP 16,18 => CoS 2
- DSCP 24,26 => CoS 3
- DSCP 32,34 => CoS 4
- DSCP 40,46 => CoS 5
- DSCP 48 => CoS 6
- DSCP 56 => CoS 7
by Olivier | Feb 27, 2010 | IOS, Lab, Non classé, QOS, Written Theory
Here are the default CoS assignement for the queue unless you modify the standard
- CoS value 0,1 => Queue 1
- CoS value 2,3 => Queue 2
- CoS value 4,5 => Queue 3
- CoS value 6,7 => Queue 4
