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C H A P T E R
3
C O N F I G U R I N G
V 1 0 0
3.4.5.1
The ANALOGUE PORTS menu
CHANNEL
All voice channels detected on power-up are presented on the same menu page. The slot number and
channel number distinguish the position of the channel within the chassis.
CLOCK REFERENCE
All voice ports may be configured completely independently of each other. The only restriction is that the
reference clock source is common to all the channels in an option slot, since the voice motherboard
(VI68701) contains one PLL. As with all other cards, the PCM sample clock generated on the voice card
must be phase-locked to either the GRX or the GTX clock busses.
SIGTYPE
Voice channel connections are made by dialling the remote destination. This may be done using tone-
based signalling, loop dialling or E&M pulses according to the application. The choice of signalling type
allows the user to specify how the channel is operated and also which of the modem or fax relays may be
used. "DTMF" signalling type decodes the tone pair digits and passes them to the remote end. "E&M"
passes all tones but decodes pulse dialling digits if present. The remaining options pass all tones but allow
the user to select which modem/fax relay function will operate. "TRANS" signalling passes all tones and
loop pulses transparently and turns off all of the modem/fax relay functions. "V.22" permits only the V.22
V100 Versatile Multiplexer Technical Manual Version 2.2
Page 58 of 231
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