C.O. SLIC Preliminary Information
®
MH88620IN
C.O. SLIC Preliminary Information
Features
• • • • • • • • • • • 600 ohm input impedance Externally select...
Description
®
MH88620IN
C.O. SLIC Preliminary Information
Features
600 ohm input impedance Externally selectable network balances Transformerless 2-4 wire conversion Programmable constant resistance feed Off-hook and dial pulse detection High immunity to externally induced longitudinal currents Auto ring trip On-hook transmission (ANI) capability Minimum protection circuitry required Compatible with requirements of CDOT DOC/ FCC, CSA/UL,CCITT Excellent power dissipation (SIL vertical mounting)
MH88620IN
ISSUE 3
April 1995
Ordering Information
40 Pin SIL Package
0° C to 70° C
Description
The Mitel MH88620IN SLIC provides all of the functions required to interface 2-wire off premise subscriber loops to a serial TDM, PCM, switching network of a modern PBX. The MH88620IN is manufactured using thick film hybrid technology which offers high voltage capability, reliability and high density resulting in significant printed circuit board area savings. A complete line card can be implemented with very few external components.
Applications
On/Off-Premise PBX Line Cards Central Office Line Cards
VBat
LGND
LCA
VDD
VEE
AGND
RING RF1 RF2 TIP TF1 TF2 Matched Feed Resistors Driver Circuitry and Speech Circuit
Loop Current Set
Switch-Hook Threshold Set Ring Filter SHK
Switch-Hook Detect
2W/4W Auto Ring Trip Impedance Network conversion
N1 N2
TRD
Test Relay Driver
Ring Relay Driver
Gain Adjust
TRC RGND VRLY RNGC RRD
Z1
Z2
GRX1 GRX0 RX GTX1 GTX0 TX
Figu...
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