Cisco Call Manager - Route Patter and Route Class

[Nila]

Hello Community,

what is the main porpose of the Route Class under Route Patter? 

What exactly is the function of this field? Do you have some examples of when to use which value?

[Jaime Valencia]

Help -> This page, brings the onboard assistance from CUCM and that explains each field, have you looked at that info?

[Nila]

Hello Jaime,

i have already read the information under Help -> This page. Unfortunately I am not that experienced and I don't know what exactly is meant by that. I would like to know when to use "Voice" and when to use "Data" for example. 

[Roger Kallberg]

This is taken from the document linked.

Route Class
Choose a route class setting for this pattern from the drop-down list box:
• Default
• Voice
• Data
• Satellite Avoidance • Hotline voice
• Hotline data
The route class is a DSN code that identifies the class of traffic for a call. The route class informs downstream devices about special routing or termination requirements. The Default setting uses the existing route class of the incoming call.
You can use non-default route class settings to translate an inbound T1 CAS route class digit into a Cisco Unified Communications Manager route class value (and strip off the digit). You should not need to assign a non-default route class setting to any other inbound calls that use pattern configuration.
If the route pattern points to a SIP trunk supporting G.Clear, then specify Data or Hotline as the Route Class.

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/10_0_1/ccmcfg/CUCM_BK_C95ABA82_00_admin-guide-100/CUCM_BK_C95ABA82_00_admin-guide-100_chapter_0100011.pdf

FYI So far I have never ever needed to use this feature myself. It's not very commonly used from my experience.