Grandstream Networks HT503 FXS/FXO

Authenticate ID ID used for authentication, usually same as SIP user ID, but could be different and

decided by ITSP.

Authentication Password Password for ATA to register to (SIP) servers of ITSP. Purposely left blank once saved

for security. Maximum length is 25.

Name SIP service subscriber’s name which will be used for Caller ID display

Use DNS SRV: Default is No. If set to Yes the client will use DNS SRV to lookup for the SIP server.

User ID is Phone Number If “Yes” is set, a “user=phone” parameter will be attached to the “From” header in SIP

request

SIP Registration This parameter controls whether the HT503 needs to send REGISTER messages to

the proxy server. The default setting is “Yes”.

Unregister on Reboot Default is No. If set to yes, the device will first send registration request to remove all

previous bindings. Use only if proxy supports this remove bindings request.

Outgoing Call w/o

Registration This parameter lets users place outgoing calls even when not registered (if allowed by

ITSP) but it’s unable to receive incoming calls.

HandyTone ATA refreshes its registration with the specified registrar. The default

interval is 60 minutes (or 1 hour). The maximum interval is 65535 minutes (about 45

days).

Local SIP port This parameter defines the local SIP port the HT503 will listen and transmit. The default

value for FXS port is 5060.

Local RTP port This parameter defines the local RTP-RTCP port pair the HandyTone ATA will listen

and transmit. It is the base RTP port for channel 0. When configured, channel 0 will use

this port _value for RTP and the port_value+1 for its RTCP; channel 1 will use

port_value+2 for RTP and port_value+3 for its RTCP. The default value for FXS port is

5004.

Use Random Port Default No. If set to Yes, the device will pick randomly-generated SIP and RTP ports.

This is usually necessary when multiple HandyTone ATAs are behind the same NAT.

Refer to Use Target Default is No. If set to “Yes”, then for Attended Transfer, the “Refer-To” header uses

the transferred target’s Contact header information.

DTMF Payload Type This parameter sets the payload type for DTMF using RFC2833

DTMF in Audio Send DTMF as inband (in-aud io).

DTMF Via RFC2833 Send DTMF via RTP (According to RFC 2833)

DTMF Via SIP INFO Send DTMF via SIP INFO message.

Send Flash Event Default is No. If set to yes, flash will be sent as DTMF event.

Enable Call Features Default is Yes. Toggles support for advanced call features and star code functions.

Offhook

Auto-Dial This parameter allows users to configure a User ID or extension number to be

automatically dialed upon offhook. Please note that only the user part of a SIP address

needs to be entered here. The HT503 will automatically append the “@” and the host

portion of the corresponding SIP address.

Note: Please write down the IP address of the ATA if you use this feature as it

will prevent access to the IVR and the only way to access the device configuration will

be via the web configuration page.

Proxy-Require SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.

Use NAT IP NAT IP address used in SIP/SDP message. Default is blank

Distinctive Ring Tone Customizes Ring Tones 1 to 3 with an associated Caller ID. When selected, the device

will ONLY use this ring tone when the incoming call is set up for Caller ID. The System

Ring Tone is used for all other calls. When selected with no Caller ID configured, the

selected ring tone will be used for all incoming calls.

Disable Call Waiting Default is No.

Disable Call Waiting

Tone Default is No. This is to disable the stutter Call Waiting Tone during a CWC. The

CWCID will still be displayed.

Ring Timeout Sets the time in which an incoming call will stop ringing when not picked up.

No Key Entry Timeout Default is 4 seconds.

Early Dial Default is No. Use only if proxy supports 484 response. This parameter controls

whether the phone will send an early INVITE each time a key is pressed when a user

Grandstream Networks, Inc. HT503 User Manual Page 24 of 35

Firmware 1.0.0.6 Last Updated: 6/2007