AT&T DEFINITY 2500 series Network Manual page 260

C-20
TRUNKING TERMS AND CAPABILITIES
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FOR EACH "SWITCH A" TRUNKING OPTION (LISTED BELOW) — REFER TO THE
CORRESPONDING RECOMMENDED "SWITCH B" TRUNK OPTIONS (RIGHT FACING PAGE).
GROUP/CALL TYPE DIREC-
GENERIC 2,
SYSTEM 85, OR
DIMENSION PBX
18/CO
19/CO
Attendant
Completing/IN
DOD
20/CO
21/FX
Attendant
Completing
22/FX
DOD
23/FX-DOD
24/FX
Attendant
Completing
IN/DID
25/FX
Notes:
9. To be used with CO applications that provide a "party test" signal toward the PBX.
10. This trunk type and optional signaling arrangement may be used to build a "Special Access" trunk group. Although other trunk
group types may be more appropriate, this trunk group signaling arrangement may function to provide trunking facilities for
MEGACOM Service.
SWITCH A
SUPERVISION
TION
GS LS RB
OUT
D-2
2W
D-1
19
2W
D-2
IN
D-1
19
OUT
D-1
19
OUT
D-2
2W
D-1
19
2W
D-2
E&M ISDN INCOMING
"ALERTING"
28 AUTO
29 AUTO
20 DMI-MOS
28 AUTO
29 AUTO
20 DMI-MOS
28
29
20
28 AUTO
29 AUTO
20 DMI-MOS
SIGNALING
OUTGOING TIMEOUT
"ADDRESSING" (NOTE 3)
(NOTE 9)
IMMED-START
WINK-START (NOTE 10)
DMI-MOS (NOTE 5)
(NOTE 9)
(NOTE 4)
(NOTE 5)
IMMED-START
WINK-START (NOTE 11)
DMI-MOS (NOTE 5)
(NOTE 9)
IMMED-START
WINK-START (NOTE 4)
DMI-MOS (NOTE 5)
(NOTE 9)