Dialogic Diva Installation Manual page 17

Channelized T1 (robbed-bit signaling)
Robbed-bit signaling, which uses bits from specified frames in the user data
channel for signaling, fits into the in-band signaling category. In this scenario,
bits are "robbed" from each channel for signaling purposes, as opposed to
ISDN PRI (out-of-band signaling) which dedicates a specific channel
(D-channel) to signaling.
Connecting to a PBX
In some installations, the PRI or T1 line is connected to a PBX instead of the
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Dialogic Diva PRI Media Board. In these cases, you must correctly configure
the PBX to communicate with the Diva PRI Media Board.
Provisioning an ISDN PRI connection
This section explains how to order an ISDN PRI line for your Dialogic
PRI Media Board.
What to order
Specify the following requirements when you place your order:
• 23 B-channels + 1 D-channel
• D-channel on channel 24 (timeslot 24). Do not order NFAS (non-facility
associated signaling service), which enables you to use channel 24 as a
data-carrying B-channel.
• Layer 1 line code is B8ZS with ESF (Extended SuperFraming).
• Data rate of 1.544 Mbps
• 64 kbps clear channel service, which ensures that calls will not be routed
over 56 kbps channels.
• Companding type is µ-law
• A CSU is not required (the Dialogic
function of the CSU internally). However, you can connect to a CSU if
present.
• A DSU is not required (the Dialogic
function of the DSU internally).
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Note: Dialogic Diva
V-4PRI PCIe FS, and V-8PRI PCIe FS Media Boards do not supply the
function of the CSU or DSU internally. You need to purchase it from an
independent distributor.
• The T1 interface number must be 0.
• The D-channel must be specified as the terminal endpoint identifier (TEI) 0.
• If the switch type is AT&T/Lucent, request that allocation of channels for
incoming calls is in descending order, high to low (23 to 1).
Dialogic® Diva® Media Board Installation Guide
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Diva Media Board supplies the
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Diva Media Board supplies the
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V-1PRI PCIe HS, V-2PRI PCIe HS, V-4PRI PCIe HS,
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Diva
page 17