External Network Settings

T880/990/3000NET Addendum

Control Panel - Administrator Settings - Network - ISDN - ISDN-BRI Settings is replaced by:

Before using the system together with external network equipment, you must specify the network parameters on this page. The system has support for up to 768kbps* using the External Network (RS449/V.35/X.21) interface. Note that the physical interface on External Networks is one non- standard 26 pin connector.

	Call Control

	RS366			RS366 Dialing would normally be used together with network clocking
	Dialing			RS449/V.35 Compatible when the external equipment uses RS366 ports.

	RS366			RS366 Adtran ISU 512 offers extra usability when dialing RS366 via an
	Adtran			ADTRAN ISU 512 IMUX. This dialing scheme will map the call type and
	ISU 512			bandwidth selection to ADTRAN ISU 512 specific suffixes to the dialed number.
				Should only be used when connected to an ADTRAN ISU 512.
				The Adtran ISU512 uses the following suffixes <Number>#C#R
				#C = Call Type
				#2 = audio
				#3 = 56kbps
				#4 = 64kbps
				#R = Channel Rate
				#0 = 2xh221 (2x56\64kbps)
				#1 to 8 = the Call Rate.

	Leased			Leased Line is a non-dialing protocol and should be used when two codecs are
	Line			connected in a point-to-point connection. Use Leased Line when the
				handshaking signals DTR and CD are available. DTR and CD correspond to
				the X.21 network’s C and I signals.

Manual

Manual should be used when no handshake signals are available and the external equipment requires a constantly connected line.

Network clocking

The network clock setting specifies the number of physical external clock signals.

RS449/V35 Compatible

Use RS449/V35 Compatible when the external equipment provides two clock signals, one for transmit and one for receive. The difference between RS449 and V35 is only the cable.

X21 Compatible

Use X21 Compatible when the external equipment provides a common clock signal for both transmit and receive.

*the TANDBERG 880 NET MXP supports 384kbps. D13719.01