User`s guide

Allworx Server Administrator’s Guide Version 7.6
1-866-ALLWORX * 585-421-3850 Page 115
www.allworx.com
Revised: 11/22/13
Line Code/DS0 Channel
Speed
Supports both B8ZS and AMI modes. Allworx strongly recommends
using B8ZS mode if the service provider supports it. Select the setting
that matches the service provider’s setting, but order the lines as B8ZS,
if the CO switch enables it.
Note:In AMI mode, clear channel data service is not available and only a
56K data rate is available on each slot. Generally, a PRI line should
always be set to B8ZS mode.
Framing
The Allworx server supports both Super Frame (D4) and Extended
Super Frame (ESF) modes. Select the setting that matches the service
provider’s configuration, but Allworx recommends having the service
provider use ESF mode, if available.
Clock Source
Enables specifying the Digital Line data clocking source reference for
this interface. Network clocking is almost always the preferred setting
because the service provider is 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 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.
Loopback Mode
Enables the interface to be put into a diagnostic mode for testing
purposes. Generally speaking always 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 disables all loop back features modes.
• Local Unframed - Does an internal analog loop back on the local
interface so that transmit data immediately loops back to the receive
path. This mode is useful for verifying that the physical interface is
operating correctly on the Allworx unit. Although not strictly required,
Allworx recommends using B8ZS, ESF, and Clock Source Internal for
such tests.
• Remote Frames - Synchronizes and decodes incoming data at the
frame level. These decoded frames are then re-framed locally and
sent back out on the transmitted output line.
• Remote Unframed - Decodes incoming data 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.
Parameter Description