The ShoreTel Voice Switch 30 supports up to 30 IP phones and up to a maximum of four analog ports (two loop start trunk and 2 analog extension ports).
The ShoreTel Voice Switch 30 supports ShoreTel IP phones, softphones, and SIP devices. The ShoreTel Voice Switch 30 interfaces to standard analog trunks using loop start or wink start signaling as well as to standard analog telephones including CLASS feature phones with Caller ID Name and Number and Message Waiting.
1.69 x 8.39 x 14.28 inches (43 x 213 x 378 mm)
5.3 lb (2.4 kg)
100-240 VAC, 50-60 Hz
23 W (max)
0-90% relative humidity (non-condensing)