[cisco-voip] Adding area code to local calls and digit manipulation at route list/route pattern level

[Gary Parker]

Thanks Lelio, that was the problem. As per https://www.ciscopress.com/articles/article.asp?p=1745737&seqNum=8

"
The three levels of digit manipulation are not cumulative. Only one level of digit manipulation will be applied. The hierarchy for these digit manipulations are as follows:

	• Digit manipulation settings on the route pattern take effect only when the route list details do not have any defined digit manipulations. A transformation CSS applied at the gateway/trunk or device pool will also cause the digit manipulations applied at the route pattern level to be skipped.
	• If the transformation CSS at the gateway or trunk matches, but the route list details have configured digit manipulations, the manipulations configured at the route list details are used. Route pattern digit manipulations are ignored.
	• If any manipulation matches through a gateway or trunk transformation CSS, all other digit manipulations are ignored.
"

I had assumed (wrongly) that changes were applied in order from route pattern, through route list/group and gateway/trunk, and were additive.

My reading of the above suggests that a transformation at Route List level overrides both Route Pattern *and* gateway/trunk transformations. Which is odd to me as, from a call flow perspective, the Route List sits in between Route Pattern and gateway/trunk.

Anyway, I set up a new route pattern, route list and route group specifically for these local calls that matched my LOCAL route filter and am applying the transformation successfully at the route group.

One other wrinkle that turned up while applying this was that the dot and @ position indication seems to be lost when transforming at the route group level. While I could successfully apply GBNP:PreDot as a digit strip option at Route Pattern level, trying to do the same at Route List/Group removes *all* digits. As a consequence I’m instead using a Called Party Transform Mask to get the last six digits of the dialled string and prefixing that with the appropriate area code.

It’s working, but it feels inelegant.

Gary


> On 21 May 2021, at 19:39, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
> 
> I didn't go through your email in detail, but, just in case, it might help.
> 
> I remember when I tried to do digit manipulation, I found that the manipulation was always dropped before as it went to the next level. Or something like that. Then, when I read the help pages, it spelled it out, something like, this takes precedence over this.
> 
> For example, on the route list detail:
> 
> The settings on this page override the settings of the same name on the Route Pattern/Route Pilot page. These settings are used for calls routed through this member of the current Route List only.
> 
> If you want the prefix digits to be seen by the TSP, then I think you have to put them on the final egress, i.e. trunk. 
> 
> It's been a while though.