cucm cisco

CUCM Functions 

CUCM broadens undertaking communication highlights and capacities to bundle communication organization 

gadgets. These bundle communication network gadgets incorporate Cisco IP Phones, mediaprocessing gadgets, VoIP entryways, and sight and sound applications. Extra information, voice, 

what's more, video administrations, for example, merged informing, mixed media conferencing, synergistic 

contact focuses, and intuitive sight and sound reaction frameworks, connect with the IP communication

arrangement through the CUCM application programming interface (API). 

CUCM gives these capacities: 

■ Call handling: Call preparing alludes to the total cycle of starting, steering, 

also, ending calls, including any charging and factual assortment measures. 

CUCM Overview 

■ Signaling and gadget control: CUCM sets up all the flagging associations between 

call endpoints and coodinates gadgets, for example, telephones, doors, and meeting extensions to 

set up and destroy real time associations. Flagging is additionally alluded to as call 

control and call arrangement/call teardown. 

■ Dial plan organization: The dial plan is a bunch of configurable records that CUCM employments 

to perform call steering. CUCM  Cisco is answerable for digit investigation, all things considered. CUCM 

empowers clients to make adaptable dial plans. 

■ Phone include organization: CUCM expands administrations, for example, hold, move, 

forward, gathering, speed dial, redial, call park, and numerous different highlights to IP telephones 

what's more, entryways. 

■ Directory administrations: CUCM utilizes its own information base to store client data. Client 

validation is performed locally or against an outer registry. Catalog 

synchronization takes into account concentrated client the executives. Catalog synchronization 

permits CUCM to use clients previously designed in a corporate-wide registry. 

Microsoft Active Directory (2000 and 2003), Netscape 4.x, iPlanet 5.1, and Sun ONE 

5.2 index incorporations are upheld. The nearby CUCM information base is a Lightweight 

Index Access Protocol (LDAP)- consistent information base (LDAPv3) part in the 

IBM Informix Database Server (IDS). 

■ Programming interface to outside applications: CUCM gives a programming 

interface to outside applications, for example, Cisco IP SoftPhone, Cisco IP Communicator, 

Cisco Unified IP Interactive Voice Response (IP IVR), Cisco Personal Assistant, Cisco 

Bound together Personal Communicator, and CUCM Attendant Console. 

■ Backup and reestablish apparatuses: CUCM gives a Disaster Recovery System (DRS) to 

back up and reestablish the CUCM design information base. The DRS framework additionally backs up

call subtleties records (CDR), call the board records (CMR), and the CDR Analysis 

what's more, Reporting (CAR) information base. 

IP telephones that legitimately register with one of the CUCMs in the bunch. 

Numerous CUCM workers share one information base, and the telephone keeps a functioning association 

to both the essential and reinforcement CUCM worker. The figure shows the telephone's legitimate TCP/ 

IP associations with the essential worker. 

 Cisco Unified Communications Manager Architecture 

 CUCM Functions 

CUCM Signaling and Media Paths 

CUCM utilizes SIP or SCCP to speak with Cisco IP Phones for call arrangement and 

teardown and for beneficial help assignments. 

After a call has been set up, media trade happens straightforwardly between the Cisco IP Phones 

across the IP organization, utilizing the Real-Time Transport Protocol (RTP) to convey the sound. 

CUCM isn't associated with a call after the call has been set up. In the event that the CUCM worker were 

unplugged during the length of the call, clients would not notification except if they endeavored to 

utilize a component on the telephone. CUCM is included distinctly in call arrangement, teardown, and highlights. On the off chance that 

the CUCM worker that set up the call were down during a discussion, end clients would 

see a message specifying "CM Down, Features Disabled" on the LCD screen of the IP 

telephone. 

Model: Basic IP Telephony Call 

Figure 1-4 delineates a client at telephone A ringing telephone B. 

Toward the start of a call, a client at IP telephone A gets the handset, and a message is sent 

to CUCM letting CUCM realize that the gadget has gone off-snare. CUCM reacts to this 

boost by answering with a message that advises the gadget to play the dial tone document that is 

put away in the glimmer memory of the telephone. The client at telephone A hears the dial tone and starts 

dialing the telephone number of telephone B. SCCP telephones send their digits to CUCM as they are 

squeezed (digit by digit), though SIP telephones send their dialed digits in a single message (enbloc 

motioning) naturally. Taste telephones have alternatives that permit them to act likewise to SCCP 

telephones (Keypad Markup Language [KPML] and dial rules). CUCM performs digit examination 

against the dialed digits. On the off chance that a match is discovered, CUCM courses the call per its arrangement. On the off chance that 

CUCM doesn't discover a match, a reorder tone is shipped off the calling party