# Shared lines with SIP

**URL:** <https://community.asterisk.org/t/shared-lines-with-sip/91544>\
**Category:** Asterisk Dialplan\
**Created:** [February 8, 2022, 7:05pm UTC](https://community.asterisk.org/t/shared-lines-with-sip/91544 "2022-02-08T19:05:52Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![pprindeville](https://avatars.discourse-cdn.com/v4/letter/p/b4bc9f/32.png) [@pprindeville](https://community.asterisk.org/u/pprindeville)\
**Post date:** [February 8, 2022, 7:05pm UTC](https://community.asterisk.org/t/shared-lines-with-sip/91544/1 "2022-02-08T19:05:52Z")

</div>

Is there a way to have multiple SIP handsets share extensions, such that when an extension is in use, it’s apparent (visibly indicated) on all handsets… and someone can drop into a bridged (conference) call just by picking up that extension?

I’m trying to emulate how multiple analog phones would work on a residential internal loop in the old POTS days, such that I can holler to my wife or kids “pick up line 2” and they can jump on the call by picking up that extension.

I’m running 18.7.1. I have SIP signaling to my ITSP. My handsets are a mix up SPA-504G’s and -942’s if that makes any difference.

It was suggested that a Parking Lot + BLF might be the best I could do, but frankly I liked the convenience of the simple/stupid analogue functionality.

---

<div class="post-metadata">

**Author:** ![david551](https://avatars.discourse-cdn.com/v4/letter/d/3bc359/32.png) [@david551](https://community.asterisk.org/u/david551)\
**Post date:** [February 8, 2022, 7:45pm UTC](https://community.asterisk.org/t/shared-lines-with-sip/91544/2 "2022-02-08T19:45:15Z")

</div>

You can use & in hint extension “dial” strings.

I’m not sure how they are combined.

With Asterisk 18, you should be using chan\_pjsip, which allows you to register multiple phones against one endpoint. I’m not sure if there is something that allows you to set a hint for endpoint as a whole, and, again, I’m not sure how the individual contacts get combined.

---

<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/asterisk/original/2X/4/475d0c889911cfb84ac4881ad6df8b523e3f9105.png) [@system](https://community.asterisk.org/u/system)\
**Post date:** [March 10, 2022, 7:45pm UTC](https://community.asterisk.org/t/shared-lines-with-sip/91544/3 "2022-03-10T19:45:41Z")

</div>

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.