Cisco 545 Serial - Manual (Page 45)

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Installation and Upgrade Guide for Cisco Unified Videoconferencing 3545 PRI Gateway and 3545 Serial Gateway Release 5.5
OL-14912-01
Chapter 2 Installing the Cisco Unified Videoconferencing 3545 Gateway
Serial Gateway Cable Connections and Pin-outs
Signaling Interface Cable Pin-out Configuration
Table 2-8 describes the signaling interface pin-out configuration for the serial gateway cables.
Table 2-8 Serial Gateway Signaling Interface Cable Pin-out
Signal Name Mnemonic RS-366 (DB-25)
Shield — 1
Digit Present DPR 2
Abandon Call & Retry ACR 3
Call Request CRQ 4
Present Next Digit PND 5
Power Indication PWI 6
Signal Ground — 7
Distant Station
Connection DSC 13
Digit Signal Circuit 1 NB1 14
Digit Signal Circuit 2 NB2 15
Digit Signal Circuit 4 NB4 16
Digit Signal Circuit 8 NB8 17
Receive Common RC 18
Send Common SC 19
Data Link Occupied DLO 22