Quick User Guides Cisco IP Phones & Accessories
Cisco Unified IP Phones 9971, 9951 & 8961:
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/cuipph/9971_9951_8961/7_1_3/english/user/qsg/qsec71en713.pdf
Cisco Unified Video Camera for 9951, 9971 & 8961 phones: https://www.cisco/c/dam/en/us/td/docs/voice_ip_comm/cuipph/9971_9951_8961/8_0/english/user/qsg/qs99came80.pdf
Cisco Unified IP Phones 8941 & 8945: https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/cuipph/8941_8945/8_5?English/qsg/QSG_8941_8945_en_815.pdf
Cisco IP Phone 7821, 7841 & 7861: https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/cuipph/7821_7841_7861/10_1/english/quick_start/quickstart_7821_7841_7861.pdf
Cisco IP Phones 6900 Series: https://www.cisco.com/assets/cdc_content_elements/flash/voice/ipphone69xx/index.html