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5.8.1.4 External Network Settings
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 2 Mbps (depending on the Bandwidth
key loaded) 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. Special cables are
required, see Interfaces
for cable pinouts.
Call Control
RS366
Dialing
RS366 Dialing is the only dialing protocol supported and would normally be
used together with network clocking RS449/V.35 Compatible when the external
equipment uses RS366 ports.
RS366
Adtran
ISU 512
RS366 Adtran ISU 512 offers extra usability when dialing RS366 via an
ADTRAN ISU 512 IMUX. This dialing scheme will map the call type and
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
Line
Leased Line is a non-dialing protocol and should be used when two codecs are
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.
Data
Triggered
Data Triggered mode uses TxData (transmit data), RxData (receive data) and
clock signals only. Use Data Triggered when no handshake signals are
available.
Manual
Manual should be used when no handshake signals are available and the
external equipment requires a constantly connected line.