3Com Notes for 3Com - Manual (Page 13)

Release Notes for 3Com Asterisk Appliance Release 1.4.0.14.3 Page 13
exten = _s-.,1,NoOp
root:~>
If Bandwidth assigns a DID range of 5551231000 -1199, the caller ID for all outgoing calls
typically is a number from the above range with the characters +1 prepended. For example,
if a user at extension 1010 dials out, the caller ID would be +15551231010. Note that this
meets Bandwidth's requirements.