Version 5.8 479 September 2009
SIP User's Manual 12. Selected Technical Specifications
12.2 MP-124 Specifications
The table below lists the main technical specifications of the MP-124.
Table 12-2: MP-124 Functional Specifications
Function Specification
Channel Capacity
Available Ports
24 analog ports
FXS Functionality
FXS Capabilities
 Short or Long Haul (Automatic Detection): REN3 - up to 9 km (30,000
feet) using a 24-AWG line
Note: The lines have been tested under the following conditions: ring
voltage greater than 32 Vrms; offhook loop current greater than 20 mA
(all lines ring simultaneously).
 Lightning and high voltage protection for outdoor operation
 Caller ID generation: Bellcore GR-30-CORE Type 1 using Bell 202 FSK
modulation, ETSI Type 1, NTT, Denmark, India, Brazil, British, and
DTMF ETSI CID (ETS 300-659-1)
 Programmable Line Characteristics: Battery feed, line current, hook
thresholds, AC impedance matching, hybrid balance, Tx & Rx
frequency response, Tx & Rx Gains
Note: For a specific coefficient file, please contact AudioCodes.
 Configurable ringing signal: up to 4 cadences and frequency from 15 to
200 Hz
 Loop-backs for testing and maintenance
Additional Features
Polarity Reversal /
Wink
Immediate or smooth to prevent erroneous ringing
Metering Tones
12/16 KHz sinusoidal bursts (Applicable only to FXS interfaces)
Distinctive Ringing
By frequency (15 - 100 Hz) and cadence patterns
Message Waiting
Indication
DC voltage generation (TIA/EIA-464-B), V23 FSK data, Stutter dial tone,
DTMF based
Voice & Tone Characteristics
Voice Compression
G.711 PCM at 64 kbps µ-law/A-law; G.723.1 MP-MLQ at 5.3 or 6.3 kbps;
G.726 at 32 kbps ADPCM; G.729 CS-ACELP 8 Kbps Annex A / B
Silence Suppression
G.723.1 Annex A; G.729 Annex B; PCM and ADPCM [Standard Silence
Descriptor (SID) with Proprietary Voice Activity Detection (VAD) and
Comfort Noise Generation (CNG)].
Packet Loss
Concealment
G.711 appendix 1; G.723.1; G.729 a/b
Echo Canceler
G.165 and G.168 2000, 64 msec
Gain Control
Configurable
DTMF Transport (in-
band)
Mute, transfer in RTP payload or relay in compliance with RFC 2833
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