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System Administration Guide

300 Main Street • East Rochester, NY 14445 • Toll Free 1-866-ALLWORX • 585-421-3850 • www.allworx.com

Revised: March 28, 2007

Page 40

When using a Digital Line for circuit switched voice operation (PRI or RBS modes), it is typically desired to

set all the Digital Line parameters including the functional definition for each time slot on T1 line. Once this

configuration has been set, each slot configured to support circuit switch voice calls will appear as a new

outside line. That is, each separate slot configured for circuit switched voice calls is logically treated as a

separate telephone line. At that point, details of how that line is routed or configured is set under the Digital

Lines section found on the Phone System / Outside Lines configuration page.

10.2.1 Information on Specific Parameters

Parameters for each Digital Line are configured on the Network / Digital Lines / Modify page for the specific

line you wish to configure. It is important to provision Digital Lines that are not going to be used as Disabled.

The disabled state is the factory default setting for each T1 line.

Description

– A friendly helpful description for the Digital Line interface. This description is used in all other

places this line is referred to, such as in the Outlines Lines view and configuration pages of the phone

system.

Line Mode – The provisioned operational mode for this interface. Currently only T1 mode and Disabled are

available. In the future, additional options may be available such as E1 and J1 for use in international markets

outside of North America.

Line Coding Mode – Both B8ZS and AMI modes are supported. It is strongly recommended that B8ZS mode

be used if the service provider supports it. You must pick the setting that matches the service provider’s

setting, but lines should be ordered as B8ZS, if the CO switch allows it.

Note: In AMI mode, clear channel data service is not available and only a 56K data rate will be available on

each slot. Generally speaking a PRI line should always be set to B8ZS mode.

Framing Mode

– The Allworx server supports both Super Frame (D4) and Extended Super Frame (ESF)

modes. You must pick the setting that matches the service provider’s configuration, but it is recommended to

have the service provider use ESF mode, if available.

Clock Source – This setting allows you to specify the Digital Line data clocking source reference for this

interface. Network clocking is almost always the desired setting because the service provider will be the

source of the timing reference and the Allworx interface will be the slave to that network clock. Internal timing

mode indicates that the Allworx device is the source of the clocking time reference. This mode is useful if you

are going to hook two devices back to back. In that case, one end needs to provide the clock reference and

the other must slave to that master. The exact terminology may vary from device to device. For this setting on

Allworx devices, Network mode means it is the slave and Internal Mode means it is the clock master.

Loop-back Mode

– This selection allows the interface to be put into a diagnostic mode for testing purposes.

Generally speaking you always want to select Normal Operation. The use of the test modes is beyond the

scope of this document:

 Normal Operation

– Transmit and receive lines that connect normally and all loop back features modes

are disabled.

 Remote Frames

– Incoming data is synchronized and decoded at the frame level. These decoded

frames are then reframed locally and sent back out on the transmitted output line.

 Remote Unframed

– Incoming data is decoded at the bit level from analog voltages to digital bits and

directly sent out as a stream of bits back towards the source on the transmitted output line. No attempt

is made to synchronize or verify the data at the frame level.