How do multiple COS apply?

[jdfoxmicro]

A COS can apply to any trunk (public, interconnect, DTS), a station, hunt groups, ring groups, ACD agents, and ACD Paths. Also when someone dials an account code. When multiple COS can apply to a call, how does the Mitel 3300 decide which to use?

[acejavelin]

The answer is it varies depending on what is applied to what... Each feature can have different interactions depending on where it is applied. COS is a "Can or Cannot do" kind of thing in most cases. The documentation for each feature tells you how it applies in the Conditions sections for the most part.

[jdfoxmicro]

Thank you for the reply. I only rarely find references to what COS is applied in the documentation (for example, "if allowed by the COS of the calling station"), and even when it seems to say, it's often still vague.

As an example, for timers or forwarding restrictions or options, when you forward an inbound call through a public trunk, does the COS of the inbound trunk, the station, or the outbound trunk apply? Where in the documentation is that specified?

When planning a setup and determining which COSes to apply to what stations and trunks to meet the feature and restriction requests of the customer, how do experienced Mitel system managers confirm everything is applied as intended? Functions testing each possible feature on each station/trunk, with every possible scenario (access code dialed, ACD user logged in) is not practicable.

I think of this in relation to Microsoft Group Policy, which also multiple polices that can apply to one user or computer. It can be confusing with hierarchies and overrides, but there is a known, documented method by which a policy overrides others on Windows Server (or doesn't), and you can also run tools to have it calculate and show you which settings are applied to a given user or computer. Is there not anything like that for the Mitel 3300?

[lundah]

For timers, the shortest will apply. For other settings, the most specific setting will apply. So for things like CPN substitution, you can have a system-wide setting, a trunk group/SIP peer specific setting, and a set specific setting. In the case of something being programmed for all 3, the set-specific setting will apply.

[jdfoxmicro]

Very informative. It makes sense the most specific and the lowest level would take precedence.

Many options are simply Yes/No. So, what if you set Yes/No options about forwarding, name display, ring behavior, etc., in one COS for a ring group, and there's another COS for the stations in the group. It seems if the COS for stations override those for a ring/hunt group, the COS on the groups wouldn't serve their purpose. So is it safe to say ring/hunt group COS would override the stations when calls are made to those group?

For ACD agents, do any of the options in a specified COS for that agent apply outside of the ACD Options group? If so, do those override the set?

Does Mitel have a documentation chapter that explains all this?

Thank you.