The GHP610(W) & GHP611(W) include an HD speaker on the handset, 2 SIP accounts/lines, 10 speed dial keys and 3 programmable keys and includes 2 models with integrated dual-band Wi-Fi support (GHP610W and GHP611W.). GDMS provides a FREE centralized interface to provision, manage, monitor and troubleshoot Grandstream products, including device management, account management, device configuration, firmware upgrades, device monitoring, intelligent alarm, and statistical analysis, individually or in batches of devices by site, group and model. This powerful cloud management platform adds robust security…. Sold and shipped by A5 IT, an authorized Grandstream partner — with US stock, live pricing, and deployment support for hotel phones.