[VoiceOps] CLID weirdness

[Dave Brockman]

Hello,
   First, please forgive me, I am a network engineer by trade, I am not 
extremely well-versed in telephony.  Please forgive me if I use the 
wrong terminology or otherwise misstate something.  It is not intended 
and does not come from malicious intent.
   I have a customer with a SIP trunk from $LocalTeleco.  We send our 
own CLID out from our (3CX) PBX.  For one specific DID (which also 
happens to be the office main number /sigh) everywhere I can see it 
calling, shows up as "Restricted, Anonymous, or Private".  However, I 
can call MCI at 800.444.4444 and they tell me the correct CLID digits. 
I have several hundred other DIDs that I can present, and appear 
correctly at the same receiving carriers that show 
restricted/anonymous/private on the main DID, and MCI will read back the 
expected digits.
   Would anyone more versed in this side of things be willing to let me 
make a couple of test calls, and you tell me if you see anything strange 
that I can take back to $LocalTeleco?  This has been working as expected 
for about 3 years, somewhere in the past couple of months, something has 
changed (and not on our end).  $LocalTeleco says everything looks fine 
to them, but I think they are not super well versed in their Phone 
switch (mostly by listening to them confer with colleagues and looking 
up documentation while I'm on the phone with them).

With Gratitude,

Dave Brockman
Senior Network Engineer
Gig City Cloud, LLC