Chapter 1. Introduction
8
May 2011
3. ETU/TTU-449
RS-449 Module:
Provides one fully compliant EIA RS-449 interface by placing an
adapter cable on the ETU/TTU-530 module and providing a male
"D-Sub" type 37 pin connector. Operates at any n56/n64 fractional
or unframed E1 speed.
4. ETU/TTU-X21
X.21 Module:
Provides one fully compliant ITU-T X.21 interface on a female "D-
Sub" type 15 pin connector. Operates at any n56/n64 fractional or
unframed E1 speed.
5. ETU/TTU-ET10/100
Ethernet Bridge Module:
Provides an Ethernet (IEEE802.3u) Bridge function over the WAN
when matched to another ET100 module, ET100 standalone, or a
compatible bridge utilizing standard HDLC (ISO 13239) protocol.
The interface connection is a shielded RJ-45 connector for
10/100Base Ethernet and auto-MDIX. Operates at any n56/n64
fractional or unframed E1 speed.
6. ETU/TTU-232
RS-232 Module:
Provides one fully compliant EIA RS-232 SYNC interface on a
female "D-Sub" type 25 pin connector. Operates at n56/n64
fractional E1 speed up to 128Kbps (ASYNC 19.2K).
7. ETU/TTU-G64
G.703/64K Module:
Provides one fully ITU-T compliant G.703 Codirectional (line
code) 64Kbps interface on a female "D-Sub" type 15 pin connector.
Operates at 64Kbps only.
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