Grandstream Networks HT881

FXO Profile 1 / FXO Profile 2
Custom Ring Tone 2 Set the caller ID using custom ringtone 2
Custom Ring Tone 2 will be used
when the caller is
If the caller number matches, a custom ringtone 2 will be used
Custom Ring Tone 3 Set the caller ID using custom ringtone 3
Custom Ring Tone 3 will be used
when the caller is
If the caller number matches, a custom ringtone 3 will be used
Ring Tone 1-10
Dene the Ringtone(s) frequencies,
Syntax: c=on1/ off1[- on2/ off2[- on3/ off3]]; (melody on/off time must be a multiple of 1ms)
Default value: c=2000/4000;
Call Waiting Tone 1-3 If the caller number matches, a custom call waiting tone will be used
Call Waiting Tone 1-3 used if
incoming caller ID is
Set the incoming call number using custom call waiting tone
Call Waiting Tone 1-10
Denes the call waiting tone cadence
Syntax: f1=val, f2=val[, c=on1/ off1[- on2/ off2[- on3/ off3]]]; (f is in Hz, on and off are calculated in 1ms. on is
the ringing time , off is the silent time)
Default value: f1=440@-13,c=300/10000;
General Settings
Account Registration
Prole Active
Activates / Deactivates the accounts. The FXO port conguration will not change if disabled, although the port
will not be operational, in this state, there will be no dial tone when picking up the analog phone and
making/receiving calls will not be possible.
Primary SIP Server
Congures SIP server IP address (Supports both IPv4 and IPv6 addresses) or domain name provided by VoIP
service provider. (For example: sip.mycompany.com, IPv4:192.168.5.170, or IPv6: fe80::20b:82ff:fe75:211d).
This is the primary SIP server used to send/receive SIP messages from/to HT841/HT881.
Failover SIP Server
Denes failover SIP server IP address (Supports both IPv4 and IPv6 addresses) or domain name provided by
VoIP service provider. (For example: sip.mycompany.com, IPv4:192.168.5.170, or IPv6
fe80::20b:82ff:fe75:211d:). This server will be used if primary SIP server becomes unavailable.
Prefer Primary SIP Server
Selects to prefer primary SIP server. The account will register to primary Server if registration with Failover
server expires. Default is No.
Outbound Proxy
Species IP address (Supports both IPv4 and IPv6 addresses) or domain name of outbound Proxy, or media
gateway, or session border controller. (For example: proxy.myprovider.com, IPv4: 192.168.5.170, or IPv6:
fe80::20b:82ff:fe75:211d). It’s Used by HT841/881 for rewall or NAT penetration in different network
environments. If symmetric NAT is detected, STUN will not work and only outbound proxy can correct the
problem
Backup Outbound Proxy
Congures the backup outbound proxy to be used when the “Outbound Proxy” registration fails. (For example:
proxy.myprovider.com, or IP address, if any: IPv4: 192.168.5.170/ IPv6: fe80::20b:82ff:fe75:211d). By default,
this eld is left empty.
Prefer Primary Outbound Proxy If the user congures this option to “Yes”, when the registration expires, the device will re-register via primary