eSpace U1981 Specifications

User capacity per U1981

A maximum of 10,000 users (including 160 directly-connected analog phone users)

Terminals supported

Analog phone, IP phone, video phone, and soft terminal

Trunk ports

A maximum of 60 FXO ports, 12 E1/T1 ports, and 20 BRI ports

Signaling protocols

PRI, QSIG, SS7, R2, and SIP

Codecs

G.711a/μ, G.729a/b/ab, iLBC, and G.722/G.722.1/G.722.2

Conference capacity

A maximum of 360 participants
A maximum of 120 conferences, with a maximum of 60 participants per conference

Built-in voice mail

30 channels concurrently
Built-in 16G SD storage card

Power supply

AC: 100–240 V AC, 50/60 Hz
DC: –38.4 to –60 V DC, typical value: –48 V DC
Two power modules in 1+1 backup mode

Power consumption

220 W (in full configuration)

Dimensions (H x W x D)

Standard 19-inch 2U subrack
86.1 mm x 442 mm x 310 mm

Weight

10 kg (in full configuration)

Environment

Storage temperature: –40°C to +70°C
Long-term operating temperature: 0°C to 45°C
Short-term operating temperature: –5°C to +55°C
Operating humidity: 5% to 95% relative humidity (RH), no condensing
Air-filtration systems should be deployed in the operating environment. Air-borne dust potency should be less than 180 mg/m³.

System reliability

≥ 99.999%
Mean time between failure (MTBF): 30 years

Manageability

Centralized/Remote device management, signaling tracing, resource management, and alarm management