CUCM:Network and Feature Services

Network Services

Network services can not be activated or deactivated.But they can only be started, stopped or restarted by the network admin from Cisco Unified Serviceability web interface.Network services are automatically activated from Cisco Unified Serviceability path, Tools > Control Center > Network Services.

Some of the examples of network services are as below.

• CDR Services: Cisco CDR Repository Manager
• Admin Services: Call Manager Admin
• CM Services: Call Manager IP Phone Service, Call Manager Extension Mobility Services
• Platform Services: Cisco Tomcat, Cisco Database, Cisco SNMP Agent
• Back up and Restore Services: Cisco CallManager Serviceability, Cisco CDP, Cisco Trace Collection Service
• Performance and Monitoring Services: RTMT Service, Cisco RTMT Reporter

Feature Services

Feature services can be activated or deactivated on per server basis.Feature Services can also be started, stopped or restarted by network admin from Cisco Unified Serviceability web interface.For that choose path ,Tools > Control Center > Network Services.

These feature services can also be activated or deactivated from Serviceability web interface path,

Tools > Service Activation.

Some of the examples of feature services are as below.

• Directory Service: Cisco Dirsync
• CM Service: Cisco CallManager, Cisco TFTP, Cisco CTIManager
• Performance and Monitoring Service: Cisco Serviceabilty Reporter
• CTI Services: Cisco CM Attendant Console Server,Cisco IP Manager Assistant
• Database and Admin Service: Cisco AXL Web Service ,Cisco TAPS Service,Cisoc Bulk Provisoning Service

User Facing Features in CUCM

In the CUCM cluster the publisher is the only server which contains read/write copy of database.All the configuration changes are done on the publisher server.Publisher server replicates the read only copy of changes to all the subscribers in the cluster.

The dynamic information which can be modified during the outage of the publisher is known as User Facing Features (UFF).

UFF data is replicated between all the servers in clusters.

Some of the examples of UFFs are as below.

• Message Waiting Indicator (MWI)
• Hunt group login status
• Device mobility (DM)
• Do Not Disturb, Enable/Disable (DND)
• Privacy, Enable/Disable
• Extension Mobility Login (EM)
• Call Forward All (CFA)

Timers in SNR Or Unified Mobility

Single number reach [SNR] or Unified Mobility allows the user to pick up enterprise call to his/her mobile phone when user not available in office.If user is back in office while call is going on, its allowed user to switch the phone from mobile to office desk phone.

How it works?

1. Assign IP phone soft-keys in two stages

• On hook
• Connected

2. Create End User in User Management >End User

• Check Enable Mobility to Enable 

3. Associate user to the IP Phone.

4. Add remote destination profile in Device > Device Settings > Remote Destination Profile > Add new. Click Save, now you can see an option to add a new Directory number (DN) .

5. Assign Directory Number and Rerouting CSS here.

6. At the end of this page click on Add a New Remote Destination and add remote destination number or mobile number here.

At the bottom of this page you will find Timer Information.These timers are listed below.

Answer Too Soon Timer

The minimum time in millisecond that CUCM requires the mobile phone to ring before answering the call.This settings accounts for the situations where the mobile phone is switched off or not reachable, in which network may immediately divert call to mobile phone voice mail.If the mobile phone is answered before this timer is expired,CUCM pulls call back to the enterprise number.

Range: 0-10,000 ms

Default:1 5,000 ms

Answer Too Late Timer

It is the maximum time in millisecond that CUCM allow to ring mobile phone.If this value is reached CUCM stop ringing mobile phone and pulls the call back to the enterprise number.

Range: 0 & 10,000-300,000 ms

Default: 19,000 ms

Delay Before Ringing Timer

Time that elapse before the mobile phone rings when call is extended to reach to remote destination.

Range: 0-30,000 ms

Default: 4,000 ms

CUCM:Line CSS & Device CSS

Before going ahead I hope you know the terms CSS and Partitions very well.If not you take a look at here.

Device CSS is applied to the IP phone added in the CUCM.Line CSS is applied to the Line / directory number.

If both CSS applied together then line CSS get higher priority and device CSS get second priority.

Cisco recommends to apply route pattern to the device and apply block pattern to the line CSS.

Here we take an example of making Local,Long distance,International and emergency calls.
We have PHONE_A with line number 1001. PHONE_A is allowed to call Local Numbers  and Emergency calls only.

For that we need to create two CSS. One in which contains all patterns  and in second we keep only blocked patterns.

CSS_Allow_ALL contains following partitions.

PT_Local
PT_Internation
PT_Longdistance
PT_Emergency

For the blocking we keep blocked numbers : Long distance partition and International partition in
CSS_Block.

CSS_Block contains following partitions.

PT_Internation
PT_Longdistance

So, Here we applied CSS_Allow_ALL to PHONE_A's device CSS and CSS_Block to PHONE_A's line CSS.With that PHONE_A is allowed to call only Local Numbers and Emergency calls only.

SIP Early Offer vs Delayed Offer

Early Offer
Initial SIP INVITE is sent with SDP message body. Session initiator allows called device to choose its codec for the session.

Why early media?

The called device might want to establish an early media RTP path to reduce the effect of audio cut-through delay for calls experiencing a long signal delay.

Calling device might want to establish early media RTP path to access DTMF or Voice driven IVR system.

Delayed Offer

Initial SIP message is sent without SDP message body.Session initiator waits for the called device to send capabilities first.

Delayed offer is recommended for SIP trunks.By default, CUCM supports delayed offer.