Mitel SX-200 EL Technician's Handbook page 187

Digital Line Card Rules for SX-200 RM Cabinets
Systems with BCC II cards have performance limits:
In high traffic configurations, keep the Digital Line Card (DLC) count
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to a maximum of 7 per bay when using BCC II cards. If you have 8
DLCs per bay, keep the device count to 84 or less. This will avoid
slow softkey response during peak traffic periods.
With 2 T1 cards in a bay, do not add more than 5 DLCs or 60
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devices. This avoids dial tone delays during peak traffic periods.
With 1 T1 card in a bay, do not add more than 6 DLCs or 72 devices.
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This avoids dial tone delays during peak traffic periods.
A BCC III supports 8 DLCs per bay and is therefore ideal for
high traffic conditions.
PRI Card Rules for SX-200 RM Cabinets
The PRI card requires the SX-200 ELx cabinet Rev. 4.4 or greater
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(PN 9109-600-002-NA) with LIGHTWARE 17 Release 4.0 or
greater. The PRI card also requires a Stratum 3 MCC.
You can only install the PRI card in a SX-200 ELx cabinet
Inserting the PRI card in a peripheral interface card slot in any
other SX-200 cabinet will cause the power supply to fail.
Only install one PRI card in a main control cabinet; Slot 10 for the
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SX-200 ML and Slot 10 or 11 for the SX-200 EL.
Install the PRI card in a peripheral cabinet for a SX-200 EL system
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with six or seven bays. This avoids the PRI card using the slot for the
Control Triple FIM Carrier card in the main control cabinet.
To change the termination type (the transmit and receive) for
the PRI links, change the stuffing of the jumper block on the
LT/NT connector. Two LT/NT connectors on the T1 module
accomodate the two T1 links. LT is for the network side and
NT is for the user side.
Installation
177