I wonder how many customers use abbreviated dialing, which was an early feature of ESS. You would program in a list of frequently called numbers and dial a 2 digit code.
Perhaps in dial days that might have been helpful, but in TT days not as much. It's a bit cumbersome to enter a number and then remember a code along with it. Lastly, many phones today have memory with that.
I think Call Waiting is the most widely used service.
I would think Call Forwarding gets some use still, though cell phones removed much of the need for that. If they had an a la carte (pay as you go) call forwarding I'd use it occassionally to route calls to my cell phone. But in my area they only offer call forwarding on a monthly subscription. Of course, since I pay for incoming calls on my cell, I would be upset being routed wrong numbers of solicitation calls and I get a fair amount of those.
[TELECOM Digest Editor's Note: At one point, Bell was offering 'Speed Dial-8' _and 'Speed Dial-32'. 8 required "#" plus a single digit 2-9 while 32 required '#" plus 2 digits 21 through 60 with a few number combos not used. I do not think they ever promoted 'Speed Dial-32' all that much. You can still get speed dial for your cell phone, although with all the ways of saving numbers on your cell phone, I cannot see why anyone would need it as a _network_ feature as well. PAT]