Verilink PRISM 4051 (34-00253.2) Product Manual - Manual (Page 37)

Software Configuration 31
DDS Network Parameters
The DDS Network Configuration screen (Figure 4-11) allows selecting parameters
for the network interface.
Data Mode. Choices are DDS I and DDS II which is a clear channel 64 kbps
without secondary channel.
Rate. This field is automatically set to 56K for DDS I and 64K (72K) for DDS II.
DDS II mode inserts 64 kbps user data from the DTE into a 72 kbps framed
network signal.
Timing. This field selects the bit rate clock source. NET uses received network
signal as clock source. INT uses an internal oscillator (± 50 ppm) for clock source.
DTE uses TXC from the DTE interface as the clock source.
Circuit Assurance. When Circuit Assurance is set to Off, CTS follows RTS. When
RTS transitions to the On state, CTS transitions to the On state after the
RTS-to-CTS delay. CTS transitions to the Off state within one bit time when RTS
transitions to the Off state.
When Circuit Assurance is set to On, CTS follows RTS if DCD is On. When RTS
transitions to the On state, CTS transitions to the On state after the RTS/CTS delay
if DCD is On. CTS transitions to the Off state within one bit time when RTS
transitions to the Off state. CTS is Off if DCD is Off.
When Circuit Assurance is On, RTS should be set to NORMAL on the DTE PORT
parameters. the FORCE DCD option changes to NORMAL when Circuit
Assurance is enabled.
Figure 4- 11 DDS Network Parameters Screen
4051 DDS 255.255/1.02 P R I S M 4 0 5 1 Date: 08/23/96
(Unit Address: 1) Time: 09:17:06
-------------------------------- NETWORK PARAMETERS ----------------------------
Date Mode: [DDS II ]
Rate: 64K (72K)
Timing: [NET]
Circuit Assurance: [OFF]
Antistreaming Timer: [OFF]
------------------------------------ Messages ----------------------------------