Instruction Manual
FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 45 of 59
Duration
indicate to the local party that the call is disconnected from the remote side.
(100-10000 ms. Default 200 ms)
Enable Hook Flash
Default is Yes. If set to “No”, FLASH button could only be used for terminating calls.
Hook Flash Timing
The time period when the cradle is pressed (Hook Flash) to simulate a FLASH. Adjust
this time value to prevent unwanted activation of the Flash/Hold and automatic phone
ring-back.
On Hook Timing
On-hook timing is the minimum time for an on-hook event to be validated.
Gain
Voice path volume adjustment.
• Rx is a gain level for signals transmitted by FXS
• Tx is a gain level for signals received by FXS.
Default = 0dB for both parameters. Loudest volume: +6dB Lowest volume: -6dB.
User can adjust volume of call on either end using the Rx Gain Level parameter and
the Tx Gain Level parameter located on the FXS Port Configuration page.
If call volume is too low when using the FXS port (ie. the ATA is at user site), adjust
volume using the Rx Gain Level parameter under the FXS Port Configuration page.
If voice volume is too low at the other end, user may increase the far end volume using
the Tx Gain Level parameter under the FXS Port Configuration page.
Disable Line Echo
Canceller (LEC)
Default is No. If set to “Yes” LEC will be disabled per call base. Recommended for
FAX/Data calls.
Ring Tones
This function lets you configure ring or tone frequencies according to preference. By
default tones are set to North American frequencies. Frequencies should be configured
with known values to avoid high pitch sounds.
TABLE 11: FXO PORT SETTINGS
Account Active
When set to “Yes” the FXO port is activated.
SIP Server
SIP Server’s IP address or Domain name provided by VoIP Service Provider.
Failover SIP Server
This Field contains the URL or the IP address of a second SIP server, this one will be
used in case the device loses the connection with the first server.
Prefer Primary SIP
Server
Default is no. If set to yes it will register to Primary Server if registration with Failover
server expires
Outbound Proxy
IP address or Domain name of Outbound Proxy, or Media Gateway, or Session Border
Controller. Used by HT503 for firewall or NAT penetration in different network
environments. If symmetric NAT is detected, STUN will not work and ONLY way to
correct the problem is to use the outbound proxy.
SIP Transport
User can select UDP, TCP or TLS