Introduction
1-33510-A2-GN32-50 January 1998
Features
The Model 3510 and Model 3511 DSUs contain the
following standard features:
• Switch-selectable data rates of 2400, 4800, 9600,
19,200, 38,400, 56,000, and 64,000 bps.
• Compatibility with the channel interface defining
DDS service in AT&T Technical Reference 62310.
• Additional option switch settings, allowing
19,200 bps loop operation at levels of –10 dBm, 0,
or +6 dBm in order to meet the requirements of
Integrated Network Corporation compatibility
bulletin CB-INC-101 and the nonadaptive Standard
Service 19,200 bps loop rate specified in Pacific
Bell publications PUB L-780035-PB/NB and PUB
L-780036-PB/NB.
• Complies with AT&T 64K Clear Channel
capabilities.
• EIA-232-D/V.24 interfacing at data rates through
19,200 bps, and CCITT V.35 inter-facing at data
rates through 64,000 bps.
• Synchronous data transmission capability.
• Local, digital and remote loopbacks, plus built-in
test pattern generator/checker.
• Both models provide streaming terminal fault,
out-of-service, and no signal indication capability.
• Elastic store for extended circuits.
• The capability to respond to digital network
mandatory channel service unit (CSU) loopback,
loop current reversal, and nonlatching DSU
loopback requests. You can configure a Model 3510
or Model 3511 DSU for 64,000 bps clear channel
operation, and it will respond to the network
latching loopback code.
• Functional interchangeability as either a control or
tributary DSU.
• Both DSUs can be configured to function as a
point-to-point LADS at 2400, 4800, 9600, 19,200,
38,400, 56,000, and 64,000 bps.
• Compatible with earlier DATAPHONE II
2500 DSUs and 2600 tributary DSUs.