Basic Call Control Comparison between Avaya and Cisco

Side by Side comparison of Avaya RED Communication Manager, Avaya Blue Call Server-1000 and Cisco Unified Call Manager

Facility Restriction Level or FRL

Communication Manager

  • Used in Class Of Restriction (COR) and Route Pattern


  • Used in Network Class Of Service (NCOS) and Route List Index

Both use FRL for the same purpose to apply access restrictions to phone and trunks

CM Example of restriction by FRL via COR on phone and FRL on route pattern


CS-1000 example of restriction by FRL via NCOS on phone and FRL on route list index


Route Pattern and Route List Index Only main function/features compared


Route Pattern

  • Is a an ordered list of trunk groups were FRL can be applied, along with Digit manipulation.


Route List Index

  • Is also an ordered list of routes (trunk groups) FRL and digit manipulation is also applied.


  • Uses Route List Index like CS-1000
  • Does not use FRL (instead uses partitions contained in Call Search Spaces)
  • Digit manipulation can be applied
  • Route Patterns are numbers that can be dialed. (as opposed to a Route Pattern being an ordered list of trunks in Avaya Red)
  • Equal to dial pattern in Avaya Aura Session Manager

Basic phone set comparison

Avaya RED CM

  • Station or extension based
  • Does not use term Directory number
  • Assign call appearances (typically 3)

Avaya Blue CS-1000

  • Port based using a Terminal number
  • Assign Directory Number (s) to keys as per set type


  • MAC address based
  • Assign Directory Number (s) to keys as per set type

UCM Partitions and Call Search spaces

Instead of using FRL with COR or NCOS, Cisco Call Manager uses Partitions and Call Search Spaces

Partitions are created and assigned too:

  • Phones
  • directory numbers
  • call forward all (CFA)/call forward no answer (CFNA)/call forward busy (CFB) destinations,
  • gateways
  • and translation patterns 

All these can belong to specific partitions

Call Search Spaces (CSS)

  • Are an ordered list of route partitions and they determine which partitions the calling devices must search when they attempt to complete a call. In order to reach a certain destination, the called party’s partition must belong to the calling party’s CSS.

Example of Call Control using Partitions and Call Search Spaces




CM Partition Routing
Partition Group Number, Route Index and Partition-route-table


CM routing by location


E.164 Call routing comparison 

  • CM uses Automatic Route Selection (ARS)
  • CS-1000 uses Network Automatic Route Selection (NARS) and Basic Automatic Route Selection (BARS) commonly called NARS-BARS
  • UCM uses Route Patterns (remember Cisco route patterns are dial patterns) with route filters and wildcards

CS-1000 CDP compared to CM and UCM

  • Coordinated Dial Plan or CDP
  • Distance Steering Code is a dial pattern that represents a phone-set(s)
  • For example 43 with a FLEN of 4 would represent 4300 to 4399 on another PBX
  • AAR or DCS is equal on CM
  • UCM is just another Route Pattern
  • All are dial patterns in Session Manager



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