4
X
E1/G.703 P
LESIOCHRONOUS
M
ULTIPLEXER
O
PERATING
M
ANUAL
IOA77-1F
2
May 2007
1.3 Examples of application
TELPHONE SWITCH
TELEPHONE SWITCH
E1 / G.703
E1 / G.703
Fiber optic line
Figure 1.
TM-77.1 multiplexers used in telephone networks
TELEPHONE SWITCH
TELEPHONE SWITCH
ROUTER
ROUTER
ETHERNET
ETHERNET
4 x E1 / G.703
4 x E1 / G.703
G.703
G.703
G.703
Fiber optic line
MD-77
MD-77
MD-77
MD-77
Fiber optic line
RING SDH
TRANSFER TERMINAL EQUIPMENT
TRANSFER TERMINAL EQUIPMENT
MD-76.1
A CK
RAL
1 0
A CK
-3
UA
L OF
NUA
10
ALACK
-6
LOOS
L DF
LOES
MD-76.1
A C K
RAL
10
A C K
-3
UA
LOF
NUA
10
ALACK
-6
LOOS
LDF
LOES
MD-76.1
AC K
RAL
10
A C K
-3
UA
LOF
N UA
10
ALACK
-6
LOOS
LDF
LOES
MD-76.1
A CK
RAL
10
AC K
-3
UA
LOF
NUA
10
ALACK
- 6
LOOS
LD F
LOES
Figure 2.
MD-77 multiplexers used to connect telephone switches and computer networks
using SDH network
