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Certifications | Cisco Collaboration

SIP CUCM

by | 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

Gatekeeper Basic Configuration

by | 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.

Connection Monitor Duration

by | Mar 2, 2010 | CUCM, Non classé, Written Theory

Connection Monitor Duration is the lenght of time before a phone which is using SRST fails back to a Call Manager after it has become available again.

The default value is 120 seconds. So if you want that your SRST phones re-homes quicker after a failover, then you have to decrease this timeout.

See also this post about SRST

Device Pool

by | Mar 2, 2010 | CUCM, Non classé, Written Theory

A Device Pool is a simple method of configuring the same parameters for a set of devices.Once you assign a device to a Device Pool, it inherits those parameters configured for the Device Pool. The seven mandatory settings are :

  • Call Manager Group
  • Date/Time Group
  • Region
  • Softkey Template
  • SRST Reference
  • MLPP Indication
  • MLPP Preemption

Call Manager Groups

by | Mar 2, 2010 | CUCM, Non classé, Written Theory

Cisco Call Manager groups can be used to specify a prioritized list of up to three Call Manager with which Cisco IP Phones can register. You assign a Call Manager to a device through a Device Pool

During a failover transition , active calls are preserved and phones will re-register once the existing calls are complete.