Grandstream Networks, Inc. HT-386 User Manual Page 14 of 34
Firmware 1.0.3.64 Last Updated: 2/2007
PSTN PASS THROUGH
HT-386 supports PSTN pass through on FXS port 1. User can make and receive PSTN calls with
attached analog phone in Phone 1 port. Phone 2 port (or FXS port 2) does NOT have this feature.
• To receive PSTN calls, simply make phone off hook when the analog phone rings.
• To make a PSTN call, simply press the PSTN access code (*00 is default, or any number
configured in web configuration page) to switch to the PSTN line and get dial tone, then dial the
number.
FAX SUPPORT
HT–386 supports FAX in two modes: T.38 (Fax over IP) and fax pass through. T.38 is the preferred
method because it is more reliable and works well in most network conditions. If the service provider
supports T.38, please use this method by selecting Fax mode to be T.38 (default). If the service provider
does not support T.38, pass-through mode may be used. To send or receive faxes in fax pass through
mode, users must select all the Preferred Codecs to be PCMU/PCMA (G.711-u/a).