8-2
Chapter 8
Connecting Optional Equipment
Common Bell
A customer-provided loud ringing device can be controlled using a dry contact pair on a MISC
daughter board. (Figure 8-3
.) Using MMC 204, programming allows for interrupted or continuous
operation of the contacts. The interrupted selection follows the C.O. ring cadence: one second
ON/three seconds OFF.
After connecting a common bell, you must assign it in MMC 601 to a group as a ring destination
by using the code for common bell. The steps for common bell operation are as follows:
• Wire the loud ringing device to the common bell control contact pair.
• Set contacts for continuous or steady operation.
• Program the hunt group to include the common bell.
• Assign the trunk to ring the hunt group containing the common bell.
Common bell control can be used with station hunt groups, individual stations and Universal An-
swer. Contacts are rated at 24 VDC–1 amp.
WARNING: Do not
attempt to connect commercial AC power to these contacts.
Ring Over Page
When a customer-provided paging system is installed, incoming calls can be assigned to ring
over page (ROP). Program the line or lines to ring a hunt group. Using MMC 601, assign ROP
as a destination in this hunt group. ROP can be used for day or night operation, or both.
SMDR/UCD/Traffic/Alarm Reports
To receive SMDR (Station Message Detail Recording), UCD statistics, traffic or alarm reports,
connect a customer-provided printer to one of the four RS232C DB9 connectors on the main
cabinet. These are marked SIO1–SIO4 on the IOM board (Figure 8-4
). Use a pin-to-pin RS232C
cable. See Figures 8-5
and 8-6 for the required pins. When the printer or optional call accounting
device needs to be more than 5m (15 ft) away from the main cabinet, use shielded computer ca-
ble. Connect the customer-provided equipment to the serial interface port selected. Attach a
male DB9 connector to the serial port—the other end must meet the requirements of the device
or printer. Use MMC 725 to set SMDR print options and use MMC 804 to set the port and trans-
mission parameters. MMC 804 is also used to select the required report(s).
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