the Enhanced EC500 field shows y.
If the Enhanced EC500 field shows y, the screens that are tied to the off-pbx-telephone commands become available.
the ISDN-BRI Trunks field, the ISDN-PRI field, the Multifrequency Signaling field, or all three fields show y.
for H.323 and SIP stations, the IP Trunks field shows y.
the Extended Cvg/Fwd Admin field shows y.
With this setting, you can get access to the Telecommuting Access screen and set the Telecommuting Access Extension field. After you set this field, users can dial the telecommuting access extension from their EC500-enabled cell phones, hear the dial tone and then dial the feature access codes after the dial tone.