The HT841/HT881 supports all the traditional and advanced telephony features, the following table summarizes each key with its corresponding Call
Feature.
Key Call Features
*02 Forcing a Codec (per call) *027110 (PCMU), *027111 (PCMA), *02723 (G723), *02729 (G729), *027201 (iLBC).
*03 Disable LEC (per call) Dial “*03” +” number”. No dial tone is played in the middle.
*16 Enable SRTP
*17 Disable SRTP
*30 Block Caller ID (for all subsequent calls)
*31 Send Caller ID (for all subsequent calls)
*47 Direct IP Calling. Dial “*47” + “IP address”. No dial tone is played in the middle.
*50 Disable Call Waiting (for all subsequent calls)
*51 Enable Call Waiting (for all subsequent calls)
*67 Block Caller ID (per call). Dial “*67” +” number”. No dial tone is played in the middle.
*82 Send Caller ID (per call). Dial “*82” +” number”. No dial tone is played in the middle.
*69 Call Return Service: Dial *69 and the phone will dial the last incoming phone number received.
*70 Disable Call Waiting (per call). Dial “*70” +” number”. No dial tone is played in the middle.
*71 Enable Call Waiting (per call). Dial “*71” +” number”. No dial tone is played in the middle
*72
Unconditional Call Forward: Dial “*72” and then the forwarding number followed by “#”. Wait for dial tone and hang up. (dial tone
indicates successful forward)
*73 Cancel Unconditional Call Forward. To cancel “Unconditional Call Forward”, dial “*73”, wait for dial tone, then hang up.
*74 Enable Paging Call: Dial “*74” and then the destination phone number you want to page.
*78 Enable Do Not Disturb (DND): When enabled all incoming calls are rejected.
*79 Disable Do Not Disturb (DND): When disabled, incoming calls are accepted.
*87 Blind Transfer
*90 Busy Call Forward: Dial “*90” and then the forwarding number followed by “#”. Wait for dial tone then hang up.
*91 Cancel Busy Call Forward. To cancel “Busy Call Forward”, dial “*91”, wait for dial tone, then hang up.
*92 Delayed Call Forward. Dial “*92” and then the forwarding number followed by “#”. Wait for dial tone then hang up.
*93 Cancel Delayed Call Forward. To cancel Delayed Call Forward, dial “*93”, wait for dial tone, then hang up