BRI ISDN, 2B+D Interface Card: (Part # VCL-MX-1550-04-5.0)
BRI ISDN Interface "U" Interface
Compliance Meets ANSI T1.601-1992 requirements
Bit Rate 160 Kbits/s
Frame Format 2B+D as per ITU-T (CCITT) Rec.1.430
Line Code 2B1Q as per ITU-T (CCITT) Rec.G.961
Accepted Line Attenuation 42dB at 40 KHz
Pulse Shape As per ITU-T (CCITT) Rec.G.961
Impedance 135 Ohms at 40KHz
Maximum distance: 5 km (4 miles) on 0.5 mm twisted Pan. Distance may vary with cable gauge.
For distance using various cable gauges please refer chart below.
Distance in kms. (Miles)
Wire Gauge (AWG/mm)
Line Rate
(Kbps)
144
19 (.9mm)
17.4 (10.8)
22 (.6mm)
11.6 (7.2)
24 (.5mm)
8.1 (5.0)
26 (.4mm)
5.5 (3.4)
Relay I/O Interface Card: (Part No. VCL-MX-1547-16-48)
Description: This interface card provides 16 Relay I/Os that may be used to extend either Dry Relay
Contacts (Relay Normally-Open or Relay Normally-Close) or operate switches remotely (using Dry
Relay Contacts rated 2A @ 60Volts DC) between any two Multiplexers using a 64 Kbps time-slot.
Maximum number of channels 144
Maximum number of interface cards 9
Relay Specifications (Drivers)
Maximum Number of Dry Contact Sensors 16
Maximum switching power 60 W (approximately)
Maximum switching voltage / current
60V DC, 2 A
250V AC, 2 A
Isolation 2.5 KVA Minimum
Typical number of operations > 1 million
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