advantages of overlap over enbloc 1

[Ihjaz]

Can anyone explain to me the advantages of overlap signalling over enbloc.

Thanks

 

[ISDNman]

Personally, I think mostly they are just different.

Enbloque has the advantage you can edit the number before sending.

Overlap has the advantage you can hear dial tone immediately after the first message, so if things are not working you can stop without dialing more digits.

 

[Ihjaz]

Thanks for replying.

Is there any situation where u need to use the overlap and cannot do with the enbloc.

 

[ISDNman]

Some PBXs support only one or the other.

Not all variants of PRI support overlap.

 

[rtfmdude]

overlap & enbloc usually cause your call processing nodes to do digit analysis/call routing differently, at least in Cisco gear it does.

I seem to remember something peculiar around having multiple devices on an S/T bus and how overlap-receiving is used, but it's been a long time since I've had to look at a BRI.

 

[ISDNman]

Hey RTFMdude,

long time no see.

Good to see you.