Comparison Cisco 7811 vs Cisco 7821

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	Cisco 7811	Cisco 7821
	from £59.45 up to £183.99 Compare prices 6	from £47.11 up to £213.84 Compare prices 9
all specs only differences
TOP sellers	Smartteck.co.uk £152.00 Buy in shop Tradeinn.com £184.00 Buy in shop Quzo.net £59.00 Buy in shop	Smartteck.co.uk £105.00 Buy in shop Tradeinn.com £113.00 Buy in shop Quzo.net £196.00 Buy in shop
Type	landline phone	landline phone
VoIP protocols	SIP	SIP
Interfaces	Ethernet Headset jack	Ethernet Headset jack
Features
Features	Caller ID Conference call Speakerphone (speakerphone) Web interface PoE support	Caller ID Conference call Speakerphone (speakerphone) Web interface PoE support
Extra features
Number of telephone lines	1	2
Display
Base display	monochrome	monochrome
General
Wall mounting
Base dimensions (HxWxT)	33x207x195 mm	28x207x206 mm
Base weight	806 g	867 g
Color
Added to E-Catalog	september 2016	june 2015

Price comparison

Number of telephone lines

The largest number of phone lines to which an IP phone can be connected at the same time. In fact, this is the number of calls that the device can simultaneously work with. Support of multiple telephone lines provides various additional features — switching between calls, organizing conferences (see "Features"), connecting people with each other, etc. The specific features, however, may be different — it all depends on the model.