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10. DCP Mode 1 Installation and Administration
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In most cases where the customer wishes to use this type of network, it will be because the network
connections are already in place. T1 facilities connect the Private Branch Exchange (PBX) to a network
point-of-presence switch which in turn is connected to the 56 Kbps facilities. Additional trunk circuits may
have to be added to handle the additional traffic. The Business Communications Systems Design Center
(BCSDC) must make this determination.
SWITCH COMPONENT INSTALLATION
See the appropriate switch and/or feature documentation for installing circuit packs and wiring trunks on
the switch.
SWITCH ADMINISTRATION
Check to make certain the customer’s switch and the central office switch are compatible. For DCP Mode
1 networking, the trunk group used to transport the AUDIX calls must be DS1 and the DS1 pipe must
employ robbed-bit signaling.
4ESS Administration
If not already done, the 4ESS must be translated for 56 Kbps operation as follows:
• The 4ESS facilities must be translated for robbed-bit transmission.
• If the 4ESS is using AMI, the System 75, System 85, or DEFINITY Communications System must be
translated for ZCS (not B8ZS).
• The trunk types on the 4ESS and switch must match (for example, both may be translated as wink/wink
type trunks).
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