YEALINKÂ IP Phone Expansion Module Black (YEA-EXP39-BK)
Supports busy lamp field, bridge line appearance Programmable for speed dialing, call pickup, intercom, hold, transfer, voicemail, forward, DND Applies to Yealink IP phone SIP-T28P and SIP-T26P and SIP-T38G Expansion module is powered by the host phone 2xRJ12 (6P6C) ports for data in and out Weight: 290g