Cisco Unified IP Phone 7900 Series

Cisco Unified Wireless IP Phone 7921G Multi-Charger

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Cisco® Unified Communications Solutions unify voice, video, data, and mobile applications on fixed and mobile networks, delivering a media-rich collaboration experience across business, government agency, and institutional workspaces. These applications use the network as the platform to enhance comparative advantage by accelerating decision time and reducing transaction time. The security, resilience, and scalability of the network enable users in any workspace to easily connect anywhere, anytime, and anyplace, using any media, device, or operating system. Cisco Unified Communications is part of a comprehensive solution that includes network infrastructure, security, wireless, management applications, lifecycle services, flexible deployment and outsourced management options, and third-party applications.


The Cisco Unified Wireless IP Phone 7921G Multi-Charger (Figure 1) is ideal for environments where customers have multiple shifts and need to keep their Cisco Unified Wireless IP Phone 7921G charged throughout the day. The multi-charger can charge up to 6 phones and 6 batteries simultaneously. Its flexible design allows the unit to be either placed on a desk or mounted on the wall to save desk space. Table 1 gives features of the multi-charger, Table 2 gives its specifications, and Table 3 gives certification and compliance information.

Figure 1. Cisco Unified Wireless IP Phone 7921G Multi-Charger

Table 1. Features



Charging capacity

6 phones and 6 batteries (standard or extended)

Mounting options

Desk or wall mount


Lead and latex free

Table 2. Specifications



Dimensions (H x W x D)

4.4 x 20.7 x 6.8 in. (112 x 525 x 173 mm)


• Multi-charger: 3.4 lb (1.5 kg)
• Power supply: 1.1 lb (0.5 kg)
• Mounting bracket: 2.2 lb (1 kg)
• Total weight: 6.7 lb (3 kg)

Power supply

• Input: 100-240V, 2A, 50/60 Hz
• Output: 19V, 5.26A
• AC adapters (by geographical region)

Power consumption

100 watts

Operating temperature

32 to 104°F (0 to 40°C)

Storage temperature

-22 to 140°F (-30 to 60°C)

Relative humidity

10 to 95% (noncondensing)

Drop specification

2.5 ft (75 cm) to concrete


1.5 Grms maximum, 0.1" double amplitude @0.887 octaves per minute from 5-500-5 Hz sweep, 10-minute dwell on three major peaks, in each of the three major mutually perpendicular axes

Thermal shock

-22°F (-30°C) 24 hours; 158°F (70°C) 24 hours

Charging time

• Standard battery only: 3.5 hours
• Extended battery only: 5 hours
• Phone with standard battery: 3 hours
• Phone with extended battery: 4.5 hours

Table 3. Safety and Compliance




• UL 60950-1
• CSA 22.2 No. 60950-1
• EN 60950
• IEC 60950-1
• AS/NZS 60950-1

Electromagnetic compatibility (EMC) and electromagnetic interference (EMI)

• CFR 47 Part 15 Class A
• ICES-003 Class A
• EN 55022 Class A
• CISPR 22 Class A
• VCCI Class A
• CSPR 24
• EN 55024
• EN 50082-1
• EN 61000-6-1
• EN 61000-3-2
• EN 61000-3-3
• EN 61000-4-2
• EN 61000-4-3
• EN 61000-4-4
• EN 61000-4-5
• EN 61000-4-6
• EN 61000-4-11

Ordering Information

Table 4 gives ordering information for the Cisco Unified Wireless IP Phone 7921G Multi-Charger.

Table 4. Ordering Information

Part Number



Cisco Unified Wireless IP Phone 7921G Multi-Charger bundle (includes multi-charger, power supply, and AC power cord)


Cisco Unified Wireless IP Phone 7921G Multi-Charger spare


Cisco Unified Wireless IP Phone 7921G Multi-Charger power supply spare


AC power cord for Australia spare


AC power cord for Europe spare


AC power cord for Japan spare


AC power cord for North America spare


AC power cord for United Kingdom spare


AC power cord for China spare


The Cisco Unified Wireless IP Phone 7921G Multi-Charger is covered by a Cisco standard 1-year replacement warranty. A Cisco SMARTnet ® optional service agreement is available.

Cisco Unified Communications Services and Support

Using the Lifecycle Services approach, Cisco and its partners offer a broad portfolio of end-to-end services to support the Cisco Unified Communications System. These services are based on proven methodologies for deploying, operating, and optimizing IP communications solutions. Upfront planning and design services, for example, can help you meet aggressive deployment schedules and minimize network disruption during implementation. Operate services reduce the risk of communications downtime with expert technical support, and optimize services enhance solution performance for operational excellence. Cisco and its partners offer a system-level service and support approach that can help you create and maintain a resilient, converged network that meets your business needs.