AT&T 7500 series Switch a, ⎜GROUP/CALL Type, ⎜⎜Direc- ⎜⎜, Supervision Signaling Tion Generic

C-18

TRUNKING TERMS AND CAPABILITIES

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SWITCH A

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FOR EACH "SWITCH A" TRUNKING OPTION (LISTED BELOW) — REFER TO THE

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CORRESPONDING RECOMMENDED "SWITCH B" TRUNK OPTIONS (RIGHT FACING PAGE).

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⎜GROUP/CALL TYPE

⎜⎜DIREC- ⎜⎜

SUPERVISION

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SIGNALING

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TION

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GENERIC 2,

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⎜⎜GS

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LS

⎜ RB

⎜ E&M

⎜ ISDN

⎜⎜ INCOMING

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OUTGOING

⎜ TIMEOUT

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SYSTEM 85, OR

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DIMENSION PBX

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⎜⎜"ALERTING"

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"ADDRESSING"

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(NOTE 3)

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12/APLT

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2W

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D-9

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⎜⎜ DELAY-DIAL

⎜ DIAL-TONE WITH

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4-6 SEC

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(Notes 1&2)

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WINK-START OR

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DELAY-DIAL

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13/APLT

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2W

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⎜ D-10

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⎜⎜WINK-START

⎜ DIAL-TONE WITH

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4-6 SEC

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(Note 1)

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⎜ WINK-START OR

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DELAY-DIAL

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14/APLT

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2W

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D-8

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⎜⎜ DELAY-DIAL

⎜ DIAL-TONE WITH

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IMMED-START

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15/APLT

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2W

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D-5

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⎜⎜WINK-START

⎜ DIAL-TONE WITH

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IMMED-START

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16/CO

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IN

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28

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AUTO

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AUTO

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(NOTE 4)

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20

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DMI-MOS

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17/CO

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OUT

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IMMED-START

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WINK-START

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20

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DMI-MOS

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(NOTE 5)

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Notes:

1.This trunk type is only applicable for APLT through dial applications (EPSCS applications).

2.Connections to an ETN-Main that is not equipped with FP8 issue 3 (yet providing Speed-Calling) should use APLT type-12 trunks (2-way delay /delay). Incoming calls can only reach the attendant via the network LDN(s) e.g., PBX access code plus a 2-, 3-, 4-, or 5-digit number. The single digit "0" will not work.

3.This type of trunk time-out indicates that if no signal is received and its expiration digits are automatically sent for outgoing type calls, and the trunk is automatically connected for incoming calls. If no signal is received and time-out occurs, then digits are automatically sent (for outgoing calls), or the trunk is automatically connected (for incoming calls).

4.This trunk type and optional signaling arrangement may be used to build a "Special Access" trunk group. Special Access refers to a direct connection to a 4 ESS toll switch. A typical application for this trunk type/signaling arrangement is to support MEGACOM800 DNIS.