Chapter 4: Configuring your MVPGSM

 

 

 

 

 

 

 

 

 

 

 

 

 

Voice/Fax Parameter Definitions (continued)

 

 

Coder Parameters

 

 

 

 

 

 

 

Coder

 

Manual or

Determines whether selection of coder is manual or automatic.

 

 

 

Automatic

When Automatic is selected, the local and remote voice

 

 

 

 

channels will negotiate the voice coder to be used by selecting

 

 

 

 

the highest bandwidth coder supported by both sides without

 

 

 

 

exceeding the Max Bandwidth setting. G.723, G.729, or G.711

 

 

 

 

are negotiated.

 

 

 

 

 

 

Selected Coder

 

G.711 a/u law 64 kbps;

Select from a range of coders with specific bandwidths. The

 

 

 

G.726, @ 16/24/32/40 kbps;

higher the bps rate, the more bandwidth is used. The channel

 

 

 

G.727, @ nine bps rates;

that you are calling must have the same voice coder selected.

 

 

 

G.723.1 @ 5.3 kbps, 6.3 kbps;

Default = G.723.1 @ 6.3 kbps. Here 64K of digital voice is

 

 

 

G.729, 8kbps;

compressed to 6.3K, allowing several simultaneous

 

 

 

Net Coder @

conversations over the same bandwidth that would otherwise

 

 

 

6.4, 7.2, 8, 8.8, 9.6 kbps

carry only one.

 

 

 

 

To make selections from the Selected Coder drop-down list, the

 

 

 

 

Manual option must be enabled.

 

 

 

 

 

 

Selected Coder

 

G.711, G.729

Coder Priority has two options (G.711,G.729 or G.729, G711) on

 

additional

 

-or-

the Selected Coder listing of the Coder group on the Voice/Fax

 

choices

 

G.729, G.711

screen. If G.711 is the higher priority, i.e., G.711 is preferred to

 

 

 

 

G729 on the sending side, then G.711, G.729 option is selected.

 

 

 

 

Similarly, if G.729 has the higher priority, then G.729, G.711

 

 

 

 

option is selected.

 

 

 

 

It is used whenever a user wants to advertise both G.711 and

 

 

 

 

G.729 coders with higher preference to a particular coder.

 

 

 

 

It is useful when the calls are made from a particular channel on

 

 

 

 

the VOIP to two different destinations where one supports

 

 

 

 

G.711 and the other supports G.729.

 

 

 

 

 

 

Max bandwidth

 

11 – 128 kbps

This drop-down list enables you to select the maximum

 

(coder)

 

 

bandwidth allowed for this channel. The Max Bandwidth drop-

 

 

 

 

down list is enabled only if the Coder is set to Automatic.

 

 

 

 

If coder is to be selected automatically (“Auto” setting), then

 

 

 

 

enter a value for maximum bandwidth.

 

Advanced Features

 

 

 

 

 

 

 

Silence

 

Y/N

Determines whether silence compression is enabled (checked)

 

Compression

 

 

for this voice channel.

 

 

 

 

With Silence Compression enabled, the MultiVOIP GSM will not

 

 

 

 

transmit voice packets when silence is detected, thereby

 

 

 

 

reducing the amount of network bandwidth that is being used

 

 

 

 

by the voice channel (default = on).

 

 

 

 

 

 

Echo

 

Y/N

Determines whether echo cancellation is enabled (checked) for

 

Cancellation

 

 

this voice channel.

 

 

 

 

Echo Cancellation removes echo and improves sound quality

 

 

 

 

(default = on).

 

 

 

 

 

 

Forward Error

 

Y/N

Determines whether forward error correction is enabled

 

Correction

 

 

(checked) for this voice channel.

 

 

 

 

Forward Error Correction enables some of the voice packets

 

 

 

 

that were corrupted or lost to be recovered. FEC doubles the

 

 

 

 

overhead to the total network bandwidth consumed by the

 

 

 

 

voice channel (default = Off).

 

 

 

 

 

Table is continued on next page…

 

Multi-Tech Systems, Inc.

MVPGSM

31

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Multi-Tech Systems MVPGSM-2 manual Coder Parameters, Net Coder @, 711, G.729, 729, G.711, Advanced Features
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MVPGSM-2 specifications

The Multi-Tech Systems MVPGSM-2 is a robust and versatile device designed for various telecommunication applications, particularly those involving GSM cellular technology. This multi-function modem is ideally suited for machine-to-machine (M2M) communication, enabling seamless data transfer for remote monitoring, control, and automation.

One of the MVPGSM-2's key features is its dual-band GSM support, which allows for enhanced connectivity and coverage. The device operates on both 850 MHz and 1900 MHz frequency bands, ensuring compatibility with a wide range of GSM networks across different geographical areas. This flexibility makes it an excellent choice for applications that require reliable wireless communication, such as in remote sensors, telemetry, and industrial automation.

The MVPGSM-2 incorporates advanced technologies like GPRS (General Packet Radio Service) and SMS (Short Message Service), enabling efficient and real-time communication capabilities. GPRS facilitates data transmission at speeds up to 114 kbps, making it suitable for sending and receiving large volumes of data quickly. The SMS functionality allows for reliable and immediate messaging, making it easier to receive alerts and notifications in real time.

One of the standout characteristics of the MVPGSM-2 is its rugged design. Built to withstand harsh environmental conditions, it features durable casing that protects it from dust and moisture. This ruggedness ensures that the device performs reliably in various industries, including agriculture, transportation, and energy, where exposure to challenging conditions is common.

Additionally, the MVPGSM-2 supports multiple I/O ports, including digital inputs and outputs, which provide flexibility in integration with various sensors and control systems. This versatility allows users to customize the device to meet specific application needs.

The device also comes with comprehensive software and development kits that streamline integration into existing systems and applications. Multi-Tech Systems offers extensive technical support and documentation, ensuring that users can easily navigate the setup process.

In summary, the Multi-Tech MVPGSM-2 is a powerful GSM modem designed for M2M communication, featuring dual-band support, GPRS and SMS capabilities, rugged design, and flexible I/O options. Its robust performance makes it a valuable tool for various industrial applications, ensuring reliable data communication and management in the field.
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