Designed specifically for call centers and enterprises. The Blackwire 3220 USB Type-A Corded Stereo UC Headset from Plantronic works with Windows platform and USB devices.. One of the best headset for small budget.
DAG2000-16O is a 16 ports FXO VoIP gateway based on the SIP2.0 standard. Totally compatible with with leading Softswitch and IPPBX like Asterisk, (Asterisk based elastix), 3CX and Freeswitch. You can use PSTN (Eg PTCL) POTS lines for trunking and convert it into SIP trunk on your LAN.