The SIP-T42U is a 12-line IP phone with multiple programmable and Yealink’s Optima HD Voice Technology with Opus codec support for superb sound quality and crystal clear communications.

We actively install network cabling across Riverside, Orange, and San Bernardino Counties. Our team often works locally in Redlands, Ontario, Riverside, San Bernardino, Perris, Fontana, Chino, March JPA, Jurupa Valley, Moreno Valley, Irvine, Rialto, and Rancho Cucamonga.

If you're not in Southern California, we can help your business manage its cloud phones and IT anywhere. Contractor's License #885004.

CalComm Systems Manages Your Office Phones & Network, So You Can Manage Your Business.

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Yealink T42U