Audio Signal

• Receive Range: -68 to +3 dBm.
• Transmit: Programmable (nominal -12 dBm).
• Frequency Response: 225 to 3400 Hz ±T.

DS1 Specifications

• Framing: D4, ESF.
• Signaling: E&M (robbed bit), Wink, digital loop start, digital ground start.
• Coding: Alternate mark inversion (AMI), B8ZS.
• Alarm Signal Capabilities: Yellow, red and blue (AIS).
• Counts: Bipolar violation, F(t) error and CRC error.
• Physical Interface: RJ48C.

DTMF Tone Detection

• DTMF Digits: 0 to 9, *, #, and ABCD (per ITU-T Q.23 and Q.24).
• Dynamic Range: -47 dBm to 0 dBm per tone.
• Tone Duration: 40 ms (minimum).
• Acceptable Twist: 12 dB.
  
• Talk Off: Exceeds all Q.24 standards including Mitel CM 7291 and Bellcore*
• TR-TSY-000762 tests.

Telephony Standards

• Digital Multiplexer Requirements/Objectives: AT&T* Pub. 43802, July 1982.
• High Capacity Digital Service/Channel Interface Specs: AT&T Pub. 62411, Sept. 1983.
• Carrier to Customer Installation DS1 Metallic Interface: ANSI T1E1/88-001R1, Feb. 1988.

Power Requirements
AC Input Models

• Voltage: 120 VAC nominal.
• Frequency: 50 to 63 Hz.
• Power: 300 Watts maximum at 120 VAC.
  

DC Input Models

• Voltage: 48 VDC nominal.
• Power: 350 Watts maximum at 48 VDC.

Operating Conditions

• Temperature: 10° to 50° C, 50° to 122° F.
• Humidity: 8 percent RH to 80 percent RH; non-condensing.

Physical Dimensions

• Height: 10.5 inches (26.67 cm).
• Width: 19.0 inches (48.26 cm).
• Depth: 18.0 inches (45.72 cm).

Approvals

• Conforms to ANSI/UL: UL 1950 3rd Edition
• Certified to CAN/CSA: CSA C22.2 950-95
• FCC Part 15, Subpart B: Class A
• FCC Part 68: No. EMCUSA-21110-XD-N
• ICN ICES-003, Issue 2: Class A
• ICS: No. 776 6142 A
• EN55022: Class A for Europe