Grandstream Networks HT881

Send Anonymous
Sets “From”, “Privacy” and “P_Asserted_Identity” headers in outgoing INVITE message to “anonymous”,
blocking caller ID. Default isNo.
Anonymous Call Rejection Rejects incoming calls with anonymous caller ID with “486 Busy here” message. Default is No.
Special Feature
Selects Soft switch vendors’ special requirements Examples of vendors: BroadSoft, CBCOM, RNK, Huawei,
China Mobile, ZTE IMS, PhonePower, TELKOM SA, Vonage, Metaswitch, CenturyLink, MTS, Oi_BR, Telefonica,
GIBTELECOM. The default is Standard.
Disable Unknown Caller ID
Disable analog phone’s caller ID when receiving a call with “Anonymous”, “unavailable” or “unknown” in FROM
header and without “Display info”.
Note: This relies also on analog phone’s design, some phones will still display “unknown” with this feature
enabled. Default isNo.
Replace Beginning '+' with 00 in
Caller ID
When this feature is set to Yes, device will replace the “+” sign at the beginning of a number in the FROM
header. Default is No.
Number of Beginning Digits to Strip
from Caller ID
Removes a specied number of digits from the beginning of the Caller ID information received before
displaying it to the called party.
The range is between 0 and 10, default is 0
Outgoing Call Duration Limit Denes the call duration limit for the outgoing calls. Default is 0 (No limit).
Incoming Call Duration Limit
Denes the call duration limit for the incoming calls.
Range is 0-180 minutes, default is 0 (No Limit)
PSTN Access Code
Denes Key pattern to use PSTN line.
Maximum 5 digits. Default is "*00"
Enable Call Features
When enabled, Do No Disturb, Call Forward and other call features can be used via the local feature codes on
the phone. Otherwise, the ITSP feature codes will be used. Enable All will override all individual features enable
setting. Default is Yes
Reset Call Features
Allows users to reset all call features conguration.
Default isNo
SRTP Feature Allow users to customize the SRTP feature codes. Default is Yes
Enable SRTP per call Enable SRTP: Default is 16
Disable SRTP per call Disable SRTP: Default is 17
SRTP per call Feature
– Enable SRTP per call: Default is18
– Disable SRTP per call: Default is19
Enable SRTP per call Set the function code to enable SRTP (the default value is 18), which is only valid for the current call
Disable SRTP per call Set the function code to disable SRTP (the default value is 18), which is only valid for the current call
CID Feature Allow users to customize the CID feature codes. Default is Yes
Enable CID Enable CID: Default is 31
Disable CID Disable CID: Default is 30
CID per call Feature Whether to display the user ID, it is only valid for the current call