Northern PM routing codes

[mrfs42]

Dunno if anyone's interested......

Just gone through my perils and put all the ABCD codes from Archway, Colindale, Finchley Central and Edgware into a machine readable database.

PM me if you want a copy - it's an openoffice 2.3 Base file.

Conversely, has anyone out there got any ABCD codes for the southern end of the line?

[JR 15secs]

Does it also show what PTI/Control room codes are?

[mrfs42]

Unfortunately not; the information is lifted (largely) from the notices installing programme machines at these locations - given the comments here about strange DMI indications *ages* ago: I was twiddling my thumbs for something to keep me occupied today.

[programmes1]

Currently changing rooms around when finished will dig out PM roll spec's

[JR 15secs]

The ABC etc are not really routing codes there are separate holes in the PM rollthe codes operate the TD equipment and it's what the PM's use to communicate, These codes are not displayed in the control rooms Cobourg St uses a different type in that Earls Cort uses letter abbrivations like MH=Mansion House, at Cobourg St a Kennington Loop via CX is XKL which is actually ABCD with a PTI code 107 before Cobourg St the regulating room at Leicester Square did display ABCD etc hope this helps.

[mrfs42]

Indeed, the change to Cobourg St saw a change in how the information was presented in the perils.

The era I've been looking at covers Leicester Square and Golders Green regulating rooms. Although the programme machines still use the ABCD codes.

[Deleted]

they have too as programme machines do not reckonise PTI codes but saying that not all programme machines have TD codes on them either sometimes just the route holes 611,612,613

[JR 15secs]

With regard PM rolls holes 12-15 are for routing and holes 18-22 for TD.