The SIP-T42S IP phone is a dynamic business communications tool for superior voice communications and extended functionality. It has a faster, more responsive interface and offers better overall performance. The SIP-T42S is a 12-line IP phone with multiple programmable keys for enhancing productivity. What's more, the SIP-T42S is built with Gigabit Ethernet technology for rapid call handling.
Specifications
General 
Product Type: VoIP phone
Phone Features 
Call Services: Voice Mail, Caller ID, Call Waiting, Call Forwarding, Call Transfer, Call Hold

Dialer Type: Keypad

Dialer Location: Base

Conference Call Capability: 3-way

Speakerphone: Yes

Menu Operation: Yes

Indicators: Visual ringer light, voice message waiting indicator, speakerphone indicator, headset, mute indicator

Additional Functions: Built-in clock, call recording, Intercom
IP Telephony 
Main Features: Multiple VoIP protocol support, integrated Ethernet switch

VoIP: Yes

VoIP Protocols: SIP, SIP v2

Voice Codecs: G.722, G.723, G.729ab, G.711u, G.711a, G.726, iLBC, Opus

Lines Supported: 12 lines

Quality of Service: IEEE 802.1Q (VLAN), Differentiated Services (DiffServ), IEEE 802.1p, Type of Service (ToS)

IP Address Assignment: DHCP, static

Security: IEEE 802.1X

Power Over Ethernet (PoE) Support: Yes

Network Protocols: IP, TCP, TFTP, UDP, HTTP, DNS, HTTPS, SRTP, TR-069, SNTP

Network Ports Qty: 2 x Ethernet 10Base-T/100Base-TX/1000Base-T

Voice Features: Comfort noise generation (CNG), voice activity detection (VAD), HD Voice, acoustic echo cancellation (AEC), packet loss concealment (PLC), adaptive jitter buffer (AJB), automatic gain control (AGC)

Network Features: Network Address Translation (NAT), Class 2 PoE, Lightweight Directory Access Protocol (LDAP)
Phone Memory 
Phone Directory Capacity: 1000 names & numbers
Display 
Type: LCD display - monochrome

Display Location: Base

Diagonal Size: 2.7"

Display Resolution: 192 x 64 pixels

Backlit: Yes
Miscellaneous 
Connections: Headset jack / RJ-9 ¦ Handset jack / RJ-9 ¦ USB ¦ Electronic hook switch (EHS) / RJ-12 ¦ Network / RJ-45

Placing / Mounting: Wall-mountable, table-top
Dimensions & Weight (Base) 
Width: 8.3 in

Depth: 7.4 in

Height: 6.9 in