Chapter 1. Introduction
3
November 2001
4. ETU/TTU-X21
X.21 Module:
Provides one fully compliant ITU-T X.21
interface on a female "D" type 15 pin
connector. Operates at any n56/n64
fractional or unframed E1 speed.
5. ETU/TTU-ET10
Ethernet Bridge Module:
Provides an Ethernet (IEEE802.3) Bridge
function over the WAN when matched to
another ET10 module, ET10A standalone,
or a compatible bridge utilizing standard
HDLC protocol. The interface connection
is a straight (MDI) or crossover (MDI-X)
10BASE-T Ethernet on a shielded RJ-45
connector. 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" type 25
pin connector. Operates at n56/n64
fractional E1 speed up to 128Kbps
(ASYNC 19.2K).
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