CP-3905
Overview
The Cisco Unified SIP Phone 3905 is a cost-effective, entry-level IP phone that addresses the need for basic voice communications with common Cisco Unified Communications features in an attractive design that is also budget-friendly. The phone can fill the communication needs of cubicle, retail, classroom, manufacturing floor and hallway, as well as various wall-mounted deployments.
Quick Specs
Table 1 shows the Quick Spec.
| Product Code | CP-3905 |
| Protocols | SIP |
| Connectivity | 10/100BASE-T wired Ethernet LAN port plus switched PC port. |
| Memory | 4-MB flash memory
32-MB synchronous dynamic RAM (SDRAM) |
| Physical dimensions | 8.07 x 5.91 x 2.11 in. (205 x 150 x 53.5 mm)
(in slab mode with the foot stand folded) |
| Weight | 20.96 oz (594.3g) |
| Power over Ethernet (PoE) | IEEE PoE 802.3af is supported, Class 1. |
Product Details
Figure 1 shows the buttons and hardware.
Note:
| Number | Buttons | Number | Buttons |
| 1 | Handset | 8 | Hold button |
| 2 | Previous button | 9 | Redial button |
| 3 | Message waiting indicator | 10 | Keypad |
| 4 | Phone screen | 11 | Speakerphone button |
| 5 | Navigation Pad and Select (center) button | 12 | Volume button |
| 6 | Application button | 13 | Mute button |
| 7 | Transfer button |






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