User`s guide

Allworx Server Administrator’s Guide Version 7.6
1-866-ALLWORX * 585-421-3850 Page 113
www.allworx.com
Revised: 11/22/13
For the above selections, operational use is the same as the corresponding analog
interface types. The system implements the precise signaling protocols for each
interface in conformance with the procedures documented in EIA/TIA-464C. Inbound
Caller-ID is supported on the FXO modes, if the CO supports it and the Allworx Server
Administrator can configure it on the Outside Lines > Digital Lines > Modify page.
For primary CO line connectivity, the preferred slot choice is the FXO Ground-Start slot
to minimize the possibility for glare conditions, especially when call volume is high.
Furthermore, Allworx does not guarantee that the network provides an explicit
disconnect signal in FXO Loop-Start mode. Normally, the user terminates a call by
hanging up the phone. However, if a call is under the supervision of the auto-attendant,
the lack of a terminating signal can cause a call to remain live for an extended period of
time (tens of seconds) after the call should be dead. Some FXO lines support a
supplemental feature known as line-side answer supervision where the network
provides an explicit signal acknowledging that the far end has picked up during an
outbound call. Because not all network equipment can produce this state, calls cannot
rely upon it and ignores the state.
13.4.6 Data Support
Configure the Allworx server to carry TCP/IP packets using PPP encapsulation on any
combination of slots constituting a full or fractional T1 interface. Even when configuring a
T1 interface for circuit switched PRI operations, use extra (non-voice) slots for dedicated
data connections as long as the remote end service provider enables this configuration.
Each T1 interface that has data slots configured on it constitutes a single logical serial
channel using HDLC encapsulation of PPP packets per RFC-1662, using any
combination of slots for data on each Digital Line, there can be only one logical data
interface definition per T1 line.
To use a Digital Line as the system’s WAN interface (for Internet traffic, inter site, etc.),
select the navigate to Network > Configuration > Modify, and select Use a T1 port as
the WAN interface option configuring the T1 interfaces.
Note:
The Allworx Server Administrator can configure and reconfigure the digital lines without a
system reboot, but changes to the Network Configuration settings do require a system
reboot after updating them.
Note:
Since the data support is fully symmetrical, it is possible to connect two Allworx servers
back-to-back between their T1 interfaces. Do this either on the same site or across sites
using a dedicated T1 line that spans between the two sites via the service provider.