Grandstream Networks HT502 User Manual page 54

Dual fxs port analog telephone adaptor

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Delay

default is 0.

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.

Use SIP User-Agent

Used to replace SIP User-Agent Header (No Default)

Header

Distinctive Ring Tone

Custom Ring Tone 1 to 3 with associate Caller ID: when selected, if Caller ID is

configured, then the device will ONLY uses this ring tone when the incoming call

is from the Caller ID.

selected but no Caller ID is configured, the selected ring tone will be used for

all incoming calls. Distinctive ring tones can be configured not only for matching

a whole number, but also for matching prefixes. In this case symbol * (star) will

be used.

For example:

area code 617. Any other incoming call will ring using cadence defined in

parameter System Ring Cadence located under Advanced Settings

Configuration page.

Note: If server supports Alert-Info header and standard ring tone set (Bellcore)

or distinctive ring tone 1-10 is specified, then the ring tone in the Alert-Info

header from server will be used. Bellcore rings and tones are independent from

custom ring tones. The custom ring tones can also be specified by alert-info

header, for example

Alert-Info: <http://127.0.0.1>;info=ring5

System Ring Tone is used for all other calls. When

if configured as *617, Ring Tone 1 will be used in case of call arrived from the

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