Table 56: OPS analog line card - ringer limitations
ONS Loop Range
Maximum Number of Ringers
(REN)
0–10 ohms
3
> 10–460 ohms
2
0 – 10 ohms
3
> 10 – 900 ohms
2
> 900 – 2300 ohms
1
Environmental specifications
Table 57: OPS analog line card - environmental specifications
on page 127 shows the
environmental specifications of the OPS analog line card.
Table 57: OPS analog line card - environmental specifications
Parameter
Specifications
Operating temperature
0° to +60° C (+32 to +140° F), ambient
Operating humidity
5 to 95% RH (non-condensing)
Storage temperature
–40° to +70° C (–40° to +158° F)
Operation
The applications, features, and signaling arrangements for each unit on the NT1R20 OPS
analog line card are assigned through LD 10 and/or jumper strap settings on the card.
The operation of each unit is configured in software and implemented in the card through
software download messages. When the NT1R20 OPS analog line card unit is idle, it provides
a ground on the tip lead and –48 V dc on the ring lead. The on-hook telephone presents a high
impedance toward the line interface unit on the card.
Incoming calls
Incoming calls to a telephone connected to the NT1R20 OPS analog line card originate from
stations that can be local (served by the PBX) or remote (served through the public switched
telephone network). The alerting signal to telephones is 20 Hz (nominal) ringing. When an
incoming call is answered, ringing is tripped as the telephone goes off-hook, placing a low-
Operation
Circuit Card Reference
July 2011 127
Summary of Contents for 1000 Series
Page 1: ...Circuit Card Reference Nortel Communication Server 1000 7 0 NN43001 311 04 04 July 2011 ...
Page 20: ...20 Circuit Card Reference July 2011 ...
Page 30: ...Introduction 30 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 116: ...Option settings 116 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 143: ...Figure 25 CP PIV card front Physical description Circuit Card Reference July 2011 143 ...
Page 148: ...NT4N39AA CP Pentium IV Card 148 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 287: ...Figure 86 Clock Controller Option 3 Operation Circuit Card Reference July 2011 287 ...
Page 302: ...NT5K21 XMFC MFE card 302 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 346: ...NT6D80 MSDL card 346 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 353: ...Figure 96 NTDK16 DLC Functional description Circuit Card Reference July 2011 353 ...
Page 461: ...Figure 147 Paging trunk operation Applications Circuit Card Reference July 2011 461 ...
Page 462: ...NT8D15 E and M Trunk card 462 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 500: ...NTAK09 1 5 Mb DTI PRI card 500 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 512: ...NTAK10 2 0 Mb DTI card 512 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 534: ...NTAK79 2 0 Mb PRI card 534 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 550: ...NTBK22 MISP card 550 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 560: ...NTBK50 2 0 Mb PRI card 560 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 595: ...Figure 165 MGC block diagram Introduction Circuit Card Reference July 2011 595 ...
Page 662: ...NTRB21 DTI PRI DCH TMDI card 662 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 668: ...NTVQ01xx Media Card 668 Circuit Card Reference July 2011 Comments infodev avaya com ...
Page 700: ......