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Yealink EXP38 – Which button is Which?

November 13, 2013
Jon

If you own a Yealink EXP38 expansion module, you may ask ‘Which button is which’?

The EXP38 offers 38 programmable buttons for the T26 and T28 model phones, including dual-colour LEDs which can be lit or flash in green or red.

As you look at the unit the buttons are split into 2-column-pairs, and are slightly staggered vertically. They are numbered left-to right as 1, 2, 20, 21, then 3, 4, 22, 23. The easiest way is to illustrate , as per the following diagram which hopefully makes sense if you are looking at a Yealink EXP38 unit in front of you:

\|1\|		\|	\|20\|
	\|2\|	\|		\|21\|
\|3\|		\|	\|22\|
	\|4\|	\|		\|23\|
\|5\|		\|	\|24\|
	\|6\|	\|		\|25\|
\|7\|		\|	\|26\|
	\|8\|	\|		\|27\|
\|9\|		\|	\|28\|
	\|10\|	\|		\|29\|
\|11\|		\|	\|30\|
	\|12\|	\|		\|31\|
\|13\|		\|	\|32\|
	\|14\|	\|		\|33\|
\|15\|		\|	\|34\|
	\|16\|	\|		\|35\|
\|17\|		\|	\|36\|
	\|18\|	\|		\|37\|
\|19\|		\|	\|38\|

It’s quite easy to remove the card inserts which name the buttons, and print a professional looking insert on a printer. We used Excel to create a simple template, and with a bit of trial-and-error managed to get a printed strip which lined up exactly with the buttons.

More about the Yealink EXP38

The Yealink EXP38 can be daisy-chained up to a total of 6 units, giving a total of 228 extra buttons – 238 including the 10 memory buttons of the Yealink T26 or Yealink T28 phones. They connect with a little RJ12 cable which is supplied with the unit, and can be powered from the phone’s power-over-ethernet or DC adapter input (up to a maximum of 2 expansion units, where after additional power must be added to any one of the expansions, by using the optional DC adapter).

The Yealink EXP38 can be programmed via the phone’s web interface, or via the phone’s mac.cfg file.

Downloads:

Yealink EXP38 Datasheet

Yealink EXP38 User Manual

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