Commander AN 616, Руководство пользователя, Страница: 49 / 128

Standard telephone stations are wired in blocks of four, as each provides four station ports.
Thus if board is inserted into SLB-AN position 4 in the main equipment, stations 22 to 25 would
all be standard telephone stations. The stations are connected to the A-pair terminals and AL2) on the
SDF.
The Ring Generator Unit (RGU-AN) requires two pairs of conductors in order to connect it into the system.
The 25Hz output terminals of RGU-AN are ALWAYS connected to the first B-pair
and BD-) in the
block of four stations corresponding to one The d.c. input terminals and are always
connected to the second B-pair in the block. An example of wiring up is shown in table 2.4.10.
One RGU-AN is required for each used in the system.
SDF
CONNECTOR B
SIGNAL
AL1
STA AL2
22 BD+
STA
2 3
STA
2 4
AL1
AL2
BD+
AL1
AL2
BD+
36
11 23WT WT ) To Standard Telephone
11
23BL --- BL ) Station No. 23
3 7 12 23RD - - - - - + / I N + ) T o R G U - A N and
12 23BK - - - - - G / I N - )
WT ) To Standard Telephone
AL1
4 0
STA
AL2
15
25 BD+
41
16
15
16
25WT
25BL
25RD
25BK
W T ) To Standard Telephone
- - - BL ) Station No. 25
Table 2.4.10 STANDARD TELEPHONE STATION,
RGU-AN AND WIRING
2.4.11 Two-Wire Extender Unit
When the loop length of cable between the SDF and the standard telephone station exceeds 300 ohms,
the Two-Wire Extender Unit
has to be installed.
Short out pins 1 and 2 of connectors Sl and S2 on the Mount the on the wall, near
the SDF. Always connect the terminals IN+ and to the second B-pair in the block of stations
corresponding to one Connect terminals OUT+ and OUT G to the third B-pair in the block. The
connections are made on the SDF. An example of how to wire in the RGU-AN and when the
board is inserted into SLB-AN position four is shown in table
One is required for each used in the system, if the loop length exceeds 300 ohms.
Note: Surge protection must be provided for external two-wire standard telephone stations as
described in 2.4.4.
2.4.12 External Music Source and External Paging
Connect the External Music Source to terminals and BGM2 (SDF pair 22). Should this source be
required to provide music-on-hold then simply connect and BGM2 terminals (SDF pair 22) to
and MHS2 terminals pair 23) on the connector A block.
The External Paging amplifier is connected to a plug and socket and wired to the
connectors via the SDF. Connect the external amplifier to terminals and EXT2 pair 21) on
the connector A block (refer table 2.4.3).
48
AN-61 6
ISSUE
1